§ 32. Certain liens and claims not to be affected. The amendments
contained in this act shall not apply to mechanics' liens, building loan
contracts, mortgages, assignments and orders referred to in section
fifteen, attachments, judgments, or to claims or liens acquired in any
action or proceeding upon such mechanics' liens, building loan
contracts, mortgages, assignments and orders, attachments or judgments,
filed, recorded, docketed, entered or obtained, or to contracts for the
improvement of real property made, prior to the date when this chapter,
as amended, takes effect.