In addition to and as an alternative to the proceedings for foreclosure of a tax lien mortgage under section 944, a municipality may, provided a waiver of foreclosure thereof has been recorded in accordance with section 944, foreclose any tax lien mortgage held by the municipality for a period of at least 4 years from the date of filing of the tax lien certificate in the registry of deeds by an action in rem for equitable relief in the following manner:
That a tax of $..... was duly assessed against ..... (name of person) on real estate bounded and described as follows:.......................................... for the year ....; that on .... (date) a tax lien certificate thereon was recorded in .... County registry of deeds in Book ...., Page ....; that on .... (date) a waiver of foreclosure thereof was recorded in said registry of deeds in Book ...., Page ....; that said tax of $....., costs to date of $....., together with interest at ..... percent per annum from ..... (date) is and still remains unpaid.
36 M.R.S. § 945