78. The annual value on 1 July 1977 of every pension granted under this act before 1 July 1977 shall be increased, where necessary, as from such date, by computing the pension on an average salary of $7,000 in all cases where the average pensionable salary used for establishing it was under that amount.
Moreover, the annual value of every pension granted under this act after 1 July 1977 shall be increased, where necessary, as from the effective date of such pension, by computing the pension on an average salary of $7,000 in all cases where the average pensionable salary used for establishing it was under that amount.