The repeal of former Section 649.2 by Chapter 783 of the Statutes of 1986 does not affect any sale, lease, mortgage, or other transaction or disposition of real property made prior to July 1, 1987, to which that section applied, and such a sale, lease, mortgage, or other transaction or disposition shall continue to be governed by the provisions of former Section 649.2 notwithstanding the repeal of that section.