Purpose and application
PLOC is for spouses and unmarried children below 21 of Singapore citizens or permanent residents who qualify for ICA LTVP/LTVP+ and wish to work. It does not permit self-employment.
Eligible foreigners can opt for PLOC when applying for or renewing their ICA LTVP/LTVP+, and request another when renewing the residence pass.
Quota, legislation and occupation restrictions
No foreign-worker levy or quota applies. Relevant legislation includes Conditions of Work Pass and the Employment of Foreign Manpower Act. Employment notifications and occupation restrictions still apply.
Official source
Written independently from official MOM source material.

