This section shall apply to affidavits recorded before November 1, 1999, as well as to those recorded thereafter, except that, with respect to those recorded before such date, the ten-year period specified above shall not expire until one (1) year after November 1, 1999. This section shall not apply as against any person in possession of the land, by occupancy or by occupancy of a tenant, at the time such purchaser acquires an interest in such land.
Okla. Stat. tit. 16, § 67