(a) Nothing in this chapter shall be construed in a manner to discourage or prohibit an employer from the adoption of a paid sick and safe leave time policy that provides greater rights or benefits than those provided pursuant to this chapter.
(b) Nothing in this chapter shall be construed as diminishing the obligation of an employer to comply with any contract, collective bargaining agreement, employment benefit plan, or other agreement that provides greater sick and safe leave time to an employee than required in this chapter.
(c) Nothing in this chapter shall be construed as diminishing the rights of public employees regarding paid sick and safe leave or use of sick and safe leave time as provided in the general laws.