Notwithstanding any other provisions to the contrary, whenever a local board of education which is a part of a consolidated county-city form of government which was established prior to February 18, 1970, administers a local teacher retirement fund, the retirement payments due on and after July 1, 1967, by the Tennessee consolidated retirement system on account of the retired members of such fund shall include the increases resulting from any minimum benefit amendments to chapter 36 of this title which have become effective on or after July 1, 1963, and such increases shall be paid directly to the retired members of such local fund.