All substantive terms and conditions of employment and benefits that were applicable at an Employer as at the effective date of this agreement and are not regulated by the agreement, shall remain in force and effect. Further any existing substantive terms and condition  of employment and benefits that were applicable as at the effective date of this agreement at a level higher/better than regulated in the agreement, such higher/better terms and conditions of employment and benefits shall continue to apply.

Therefore, no Employer shall reduce such substantive conditions of employment and benefits to the level of what is contained in the Main Agreement.