The Mason Tenders’ District Council of Greater New York and Long Island has emerged as one of the most progressive and aggressive labor organizations in the nation. The over 17,000 members of the Mason Tenders District Council (MTDC) include construction workers, asbestos and hazardous materials handlers, recycling and waste handlers and Catholic high school teachers.
https://masontenders.org/

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Note added at 43 mins (2023-12-18 23:24:08 GMT)
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As a reminder, the Mason Tenders’ District Council Welfare Fund (the “Fund”) has been providing New York Paid Family Leave (PFL) benefits to eligible members covered under the Fund since January 1, 2018 (the effective date of the NYPFL requirement). Accordingly, contributing employers do not need to collect, nor should they collect, PFL premiums from collectively-bargained employees who are participants in the Fund. Note that an employee who has contributions reciprocated from the Fund to another welfare fund pursuant to a reciprocal agreement is not a participant in the Fund and, therefore, is not eligible for PFL coverage from the Fund.
https://member.mtdctrustfunds.org/