New Jersey employers hope to contain last-minute chaos as they hustle to implement proposed guidelines for the state’s new paid sick leave law. The law kicks in Oct. 29.

Employers need programs and processes in place to ensure that workers can start accruing sick leave by then. Gov. Phil Murphy (D) signed the New Jersey Paid Sick Leave Act (A1827) in May, and New Jersey’s Department of Labor and Workforce Development released proposed rules last month.

The regulations...