O. Reg. 66/20 was made on March 19, 2020 but pursuant to section 3 was deemed to have come into force on January 25, 2020.  It prescribed certain matters related to infectious disease emergency leave.

On May 29, 2020, O. Reg. 66/20 was revoked and replaced by O. Reg.. 228/20.  All of the substantive provisions of O. Reg. 66/20 were maintained in O. Reg. 228/20 - see O. Reg. 228/20 for details.