Final answer:
The provided reference does not specify the number of days within which a builder must file a Notice of Commencement for the Lien Recovery Act. Contractors must look up the specific requirements of the Act in their area for accurate information.
Step-by-step explanation:
If contractors and subcontractors want protection under the Lien Recovery Act, one of the requirements is that the builder must file a Notice of Commencement within a specified number of days of beginning work. The provided information about employers with more than 100 employees needing to provide a 60-day written notice before plant closings or large layoffs pertains to employment law, but appears to be unrelated to the specific guidelines of the Lien Recovery Act concerning construction work and does not give a clear number of days for the Notice of Commencement.
To ensure protection under the Lien Recovery Act, contractors should refer to the specific provisions of the Act in their jurisdiction as the timeframe for filing could vary by location.