I. A resident who is homeless without a permanent street address at the time of registration or re-registration may register a vehicle by certifying to the department in writing that he or she is currently resident in the town or city and by providing a letter signed by an authorized representative of a social service organization or agency qualified under section 501(c)(3) of the Internal Revenue Code stating that the person is authorized to use the mailing address of the organization or agency for purposes of contact by the department.
II. A certification of current residency and a current letter authorizing the use of the mailing address of a qualified social service agency or organization shall be submitted to the department in connection with every registration made under this section. The director shall provide the form on which the certification is made.
III. Residency for the purposes of this section shall be defined as the expressed intention to continue to reside in the municipality.