(A) The annual amount of each benefit that was based on an award made effective before July 1, 1979, shall be increased as follows:

Per Cent of

Effective Date of Award Increase in Benefit

Prior to July 1, 1971 4.15

July 1, 1971, through August 31, 19762.65

September 1, 1976, through June 30, 19791.4

(B) Effective June 1, 1990, in addition to the increase provided under division (A) of this section, the annual amount of each benefit that was based on an award made effective before July 1, 1979, shall be increased as follows:

Per Cent of

Effective Date of Award Increase in Benefit

Prior to July 1, 1971 4.15

July 1, 1971, through August 31, 19762.65

September 1, 1976, through June 30, 19791.4

(C) Amounts paid pursuant to this section shall not be included in the base for future increases under former section 3307.403 of the Revised Code in any benefit.