All registrations of instruments heretofore made in the office of register of deeds of the several counties by the register’s assistant or deputy, and signed in the name of the register of deeds by the assistant or deputy, and initialed by the assistant or deputy, instead of being signed by them as assistant or deputy, when such registrations are in all other respects regular, are hereby validated and declared to be of the same force and effect as if signed by the assistant or deputy in the respective capacity. (1991 (Reg. Sess., 1992), c. 877, s. 1.)