1. A pharmacist with a certificate of medication therapeutic plan authority may provide influenza, group A streptococcus, and COVID-19 medication therapy services pursuant to a statewide standing order issued by the director or chief medical officer of the department of health and senior services if that person is a licensed physician, or a licensed physician designated by the department of health and senior services.

2. The state board of registration for the healing arts, pursuant to section 334.125, and the state board of pharmacy, pursuant to section 338.140, shall jointly promulgate rules to implement the provisions of this section. Any rule or portion of a rule, as that term is defined in section 536.010, that is created under the authority delegated in this section shall become effective only if it complies with and is subject to all of the provisions of chapter 536 and, if applicable, section 536.028. This section and chapter 536 are nonseverable and if any of the powers vested with the general assembly pursuant to chapter 536 to review, to delay the effective date, or to disapprove and annul a rule are subsequently held unconstitutional, then the grant of rulemaking authority and any rule proposed or adopted after August 28, 2023, shall be invalid and void.