Section 8J. Any contract, except contracts providing supplemental coverage to medicare or other governmental programs, between a subscriber and the corporation under an individual group hospital service plan which shall be delivered, issued or renewed in the commonwealth shall provide, as a basic benefit to all individual subscribers and members within the commonwealth and to all group members having a principal place of employment within the commonwealth, for expense for cytologic screening and mammographic examination. Said benefits shall be at least equal to the following minimum requirements: (a) in the case of benefits for cytologic screening, said benefits shall provide for an annual cytologic screening for women eighteen years of age and older; and (b), in the case of benefits for mammographic examination, said benefits shall provide for a baseline mammogram for women between the ages of thirty-five and forty and for a mammogram on an annual basis for women forty years of age and older.