Notwithstanding the provisions of section two of this article, the board of optometry may grant qualified optometrists prescriptive authority for oral antibiotics, oral nonsteroidal anti-inflammatory drugs, and oral carbonic anhydrase inhibitors: Provided, That the board has proposed rules for legislative approval in accordance with the provisions of article three, chapter twenty-nine-a of this code, defining a certification process for individual optometrists that provide standards for education, training and adequate insurance coverage determined by the board to be conditions precedent to certification authorizing the individual optometrist to prescribe drugs excluded pursuant to the provisions of section two of this article but authorized by this section, and the optometrist desiring to employ the use of these pharmaceutical agents has met the necessary qualifications as established by rule.