Section 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.