As used in this chapter, unless the context otherwise provides:

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(1) “Arising out of and in the course of his employment” means an accidental injury happening to an employee or an occupational disease of an employee originating while the employee has been engaged in the line of the employee’s duty in the business or affairs of the employer upon the employer’s premises, or while engaged elsewhere upon the employer’s business or affairs by the direction, express or implied, of the employer, provided:

(A) (i) For a police officer or firefighter, “in the course of his employment” encompasses such individual’s departure from such individual’s place of abode to duty, such individual’s duty, and the return to such individual’s place of abode after duty;

(ii) For an employee of the Department of Correction, (I) when responding to a direct order to appear at such employee’s assignment under circumstances in which nonessential employees are excused from working, or (II) following two or more mandatory overtime work shifts on consecutive days, “in the course of his employment” encompasses such individual’s departure from such individual’s place of abode directly to duty, such individual’s duty, and the return directly to such individual’s place of abode after duty;

(iii) For a telecommunicator, as defined in section 28-30, (I) when a telecommunicator is subject to emergency calls while off duty by the terms of such telecommunicator’s employment, (II) when responding to a direct order to appear at such telecommunicator’s work assignment under circumstances in which nonessential employees are excused from working, or (III) following two or more mandatory overtime work shifts on consecutive days, “in the course of his employment” encompasses such individual’s departure from such individual’s place of abode directly to duty, such individual’s duty, and the return directly to such individual’s place of abode after duty;

(iv) Notwithstanding the provisions of clauses (i) and (ii) of this subparagraph, the dependents of any deceased employee of the Department of Correction who was injured in the course of his employment, as defined in this subparagraph, on or after July 1, 2000, and who died not later than July 15, 2000, shall be paid compensation on account of the death, in accordance with the provisions of section 31-306, retroactively to the date of the employee’s death. The cost of the payment shall be paid by the employer or its insurance carrier which shall be reimbursed for such cost from the Second Injury Fund as provided in section 31-354 upon presentation of any vouchers and information that the Treasurer may require;

(B) A personal injury shall not be deemed to arise out of the employment unless causally traceable to the employment other than through weakened resistance or lowered vitality;

(C) In the case of an accidental injury, a disability or a death due to the use of alcohol or narcotic drugs shall not be construed to be a compensable injury;

(D) For aggravation of a preexisting disease, compensation shall be allowed only for that proportion of the disability or death due to the aggravation of the preexisting disease as may be reasonably attributed to the injury upon which the claim is based;

(E) A personal injury shall not be deemed to arise out of the employment if the injury is sustained: (i) At the employee’s place of abode, and (ii) while the employee is engaged in a preliminary act or acts in preparation for work unless such act or acts are undertaken at the express direction or request of the employer;

(F) For purposes of subparagraph (C) of this subdivision, “narcotic drugs” means all controlled substances, as designated by the Commissioner of Consumer Protection pursuant to subsection (c) of section 21a-243, but does not include drugs prescribed in the course of medical treatment or in a program of research operated under the direction of a physician or pharmacologist. For purposes of subparagraph (E) of this subdivision, “place of abode” includes the inside of the residential structure, the garage, the common hallways, stairways, driveways, walkways and the yard;

(G) The Workers’ Compensation Commission shall adopt regulations, in accordance with the provisions of chapter 54, to implement the provisions of this section and shall define the terms “a preliminary act”, “acts in preparation for work”, “departure from place of abode directly to duty” and “return directly to place of abode after duty” on or before January 1, 2006.

(2) “Commission” means the Workers’ Compensation Commission.

(3) “Administrative law judge” means the administrative law judge who has jurisdiction in the matter referred to in the context.

(4) “Compensation” means benefits or payments mandated by the provisions of this chapter, including, but not limited to, indemnity, medical and surgical aid or hospital and nursing service required under section 31-294d and any type of payment for disability, whether for total or partial disability of a permanent or temporary nature, death benefit, funeral expense, payments made under the provisions of section 31-284b, 31-293a or 31-310, or any adjustment in benefits or payments required by this chapter.

(5) “Date of the injury” means, for an occupational disease, the date of total or partial incapacity to work as a result of such disease.

(6) “Dependent” means a member of the injured employee’s family or next of kin who was wholly or partly dependent upon the earnings of the employee at the time of the injury.

(7) “Dependent in fact” means a person determined to be a dependent of an injured employee, in any case where there is no presumptive dependent, in accordance with the facts existing at the date of the injury.

(8) “Disfigurement” means impairment of or injury to the beauty, symmetry or appearance of a person that renders the person unsightly, misshapen or imperfect, or deforms the person in some manner, or otherwise causes a detrimental change in the external form of the person.

(9) (A) “Employee” means any person who:

(i) Has entered into or works under any contract of service or apprenticeship with an employer, whether the contract contemplated the performance of duties within or without the state;

(ii) Is a sole proprietor or business partner who accepts the provisions of this chapter in accordance with subdivision (10) of this section;

(iii) Is elected to serve as a member of the General Assembly of this state;

(iv) Is a salaried officer or paid member of any police department or fire department;

(v) Is a volunteer police officer, whether the officer is designated as special or auxiliary, upon vote of the legislative body of the town, city or borough in which the officer serves;

(vi) Is an elected or appointed official or agent of any town, city or borough in the state, upon vote of the proper authority of the town, city or borough, including the elected or appointed official or agent, irrespective of the manner in which he or she is appointed or employed. Nothing in this subdivision shall be construed as affecting any existing rights as to pensions which such persons or their dependents had on July 1, 1927, or as preventing any existing custom of paying the full salary of any such person during disability due to injury arising out of and in the course of his or her employment;

(vii) Is a member of the armed forces of the state while in the performance of military duty, whether paid or unpaid for such military duty, in accordance with the provisions of section 27-17, 27-18 or 27-61; or

(viii) Is elected to serve as a probate judge for a probate district established in section 45a-2.

(B) “Employee” shall not be construed to include:

(i) Any person to whom articles or material are given to be treated in any way on premises not under the control or management of the person who gave them out;

(ii) One whose employment is of a casual nature and who is employed otherwise than for the purposes of the employer’s trade or business;

(iii) A member of the employer’s family dwelling in his house; but, if, in any contract of insurance, the wages or salary of a member of the employer’s family dwelling in his house is included in the payroll on which the premium is based, then that person shall, if he sustains an injury arising out of and in the course of his employment, be deemed an employee and compensated in accordance with the provisions of this chapter;

(iv) Any person engaged in any type of service in or about a private dwelling provided he is not regularly employed by the owner or occupier over twenty-six hours per week;

(v) An employee of a corporation who is a corporate officer and who elects to be excluded from coverage under this chapter by notice in writing to his employer and to the administrative law judge; or

(vi) Any person who is not a resident of this state but is injured in this state during the course of his employment, unless such person (I) works for an employer who has a place of employment or a business facility located in this state at which such person spends at least fifty per cent of his employment time, or (II) works for an employer pursuant to an employment contract to be performed primarily in this state.

(10) “Employer” means any person, corporation, limited liability company, firm, partnership, voluntary association, joint stock association, the state and any public corporation within the state using the services of one or more employees for pay, or the legal representative of any such employer, but all contracts of employment between an employer employing persons excluded from the definition of employee and any such employee shall be conclusively presumed to include the following mutual agreements between employer and employee: (A) That the employer may accept and become bound by the provisions of this chapter by immediately complying with section 31-284; (B) that, if the employer accepts the provisions of this chapter, the employee shall then be deemed to accept and be bound by such provisions unless the employer neglects or refuses to furnish immediately to the employee, on his or her written request, evidence of compliance with section 31-284 in the form of a certificate from the administrative law judge, the Insurance Commissioner or the insurer, as the case may be; (C) that the employee may, at any time, withdraw his or her acceptance of, and become released from, the provisions of this chapter by giving written or printed notice of his or her withdrawal to the chairperson and to the employer, and the withdrawal shall take effect immediately from the time of its service on the chairperson and the employer; and (D) that the employer may withdraw his or her acceptance and the acceptance of the employee by filing a written or printed notice of his or her withdrawal with the chairperson and with the employee, and the withdrawal shall take effect immediately from the time of its service on the chairperson and the employee. The notices of acceptance and withdrawal to be given by an employer employing persons excluded from the definition of employee and the notice of withdrawal to be given by the employee, as provided in this subdivision, shall be served upon the chairperson, employer or employee, in accordance with section 31-321. In determining the number of employees employed by an individual, the employees of a partnership of which he is a member shall not be included. A person who is the sole proprietor of a business may accept the provisions of this chapter by notifying the chairperson, in writing, of his or her intent to do so. If such person accepts the provisions of this chapter he shall be considered to be an employer and shall insure his or her full liability in accordance with subdivision (2) of subsection (b) of section 31-284. Such person may withdraw his or her acceptance by giving notice of his or her withdrawal, in writing, to the chairperson. Any person who is a partner in a business shall be deemed to have accepted the provisions of this chapter and shall insure his or her full liability in accordance with subdivision (2) of subsection (b) of section 31-284, unless the partnership elects to be excluded from the provisions of this chapter by notice, in writing and by signed agreement of each partner, to the chairperson.

(11) “Full-time student” means any student enrolled for at least seventy-five per cent of a full-time student load at a postsecondary educational institution which has been approved by a state-recognized or federally-recognized accrediting agency or body. “Full-time student load” means the number of credit hours, quarter credits or academic units required for a degree from such institution, divided by the number of academic terms needed to complete the degree.

(12) “Medical and surgical aid or hospital and nursing service”, when requested by an injured employee and approved by the administrative law judge, includes treatment by prayer or spiritual means through the application or use of the principles, tenets or teachings of any established church without the use of any drug or material remedy, provided sanitary and quarantine regulations are complied with, and provided all those ministering to the injured employee are bona fide members of such church.

(13) “Member” includes all parts of the human body referred to in subsection (b) of section 31-308.

(14) “Nursing” means the practice of nursing as defined in subsection (a) of section 20-87a, and “nurse” means a person engaged in such practice.

(15) “Occupational disease” includes any disease peculiar to the occupation in which the employee was engaged and due to causes in excess of the ordinary hazards of employment as such, and includes any disease due to or attributable to exposure to or contact with any radioactive material by an employee in the course of his employment.

(16) (A) “Personal injury” or “injury” includes, in addition to accidental injury that may be definitely located as to the time when and the place where the accident occurred, an injury to an employee that is causally connected with the employee’s employment and is the direct result of repetitive trauma or repetitive acts incident to such employment, and occupational disease.

(B) “Personal injury” or “injury” shall not be construed to include:

(i) An injury to an employee that results from the employee’s voluntary participation in any activity the major purpose of which is social or recreational, including, but not limited to, athletic events, parties and picnics, whether or not the employer pays some or all of the cost of such activity;

(ii) A mental or emotional impairment, unless such impairment (I) arises from a physical injury or occupational disease, (II) in the case of a police officer of the Division of State Police within the Department of Emergency Services and Public Protection, an organized local police department or a municipal constabulary, arises from such police officer’s use of deadly force or subjection to deadly force in the line of duty, regardless of whether such police officer is physically injured, provided such police officer is the subject of an attempt by another person to cause such police officer serious physical injury or death through the use of deadly force, and such police officer reasonably believes such police officer to be the subject of such an attempt, or (III) in the case of an eligible individual as defined in section 31-294k, is a diagnosis of post-traumatic stress injury as defined in section 31-294k that meets all the requirements of section 31-294k. As used in this clause, “in the line of duty” means any action that a police officer is obligated or authorized by law, rule, regulation or written condition of employment service to perform, or for which the police officer or firefighter is compensated by the public entity such officer serves;

(iii) A mental or emotional impairment that results from a personnel action, including, but not limited to, a transfer, promotion, demotion or termination; or

(iv) Notwithstanding the provisions of subparagraph (B)(i) of this subdivision, “personal injury” or “injury” includes injuries to employees of local or regional boards of education resulting from participation in a school-sponsored activity but does not include any injury incurred while going to or from such activity. As used in this clause, “school-sponsored activity” means any activity sponsored, recognized or authorized by a board of education and includes activities conducted on or off school property and “participation” means acting as a chaperone, advisor, supervisor or instructor at the request of an administrator with supervisory authority over the employee.

(17) “Physician” includes any person licensed and authorized to practice a healing art, as defined in section 20-1, and licensed under the provisions of chapters 370, 372 and 373 to practice in this state.

(18) “Podiatrist” means any practitioner of podiatry, as defined in section 20-50, and duly licensed under the provisions of chapter 375 to practice in this state.

(19) “Presumptive dependents” means the following persons who are conclusively presumed to be wholly dependent for support upon a deceased employee: (A) A wife upon a husband with whom she lives at the time of his injury or from whom she receives support regularly; (B) a husband upon a wife with whom he lives at the time of her injury or from whom he receives support regularly; (C) any child under the age of eighteen, or over the age of eighteen but physically or mentally incapacitated from earning, upon the parent with whom he is living or from whom he is receiving support regularly, at the time of the injury of the parent; (D) any unmarried child who has attained the age of eighteen but has not attained the age of twenty-two and who is a full-time student, upon the parent with whom he is living or from whom he is receiving support regularly, provided, any child who has attained the age of twenty-two while a full-time student but has not completed the requirements for, or received, a degree from a postsecondary educational institution shall be deemed not to have attained the age of twenty-two until the first day of the first month following the end of the quarter or semester in which he is enrolled at the time, or if he is not enrolled in a quarter or semester system, until the first day of the first month following the completion of the course in which he is enrolled or until the first day of the third month beginning after such time, whichever occurs first.

(20) “Previous disability” means an employee’s preexisting condition caused by the total or partial loss of, or loss of use of, one hand, one arm, one foot or one eye resulting from accidental injury, disease or congenital causes, or other permanent physical impairment.

(21) “Scar” means the mark left on the skin after the healing of a wound or sore, or any mark, damage or lasting effect resulting from past injury.

(22) “Second disability” means a disability arising out of a second injury.

(23) “Second injury” means an injury, incurred by accident, repetitive trauma, repetitive acts or disease arising out of and in the course of employment, to an employee with a previous disability.