contains, in respect of the employees bound by the collective agreement (whether by reference to the work or types of work done by the employees or by reference to named employees or types of employees),—
(i)
the rates of wages or salary payable for certain work or types of work or to certain employees or types of employees; or
(ii)
the minimum rates of wages or salary payable for certain work or types of work or to certain employees or types of employees; or
(iii)
1 or more methods of calculating the rates or minimum rates of wages or salary payable for certain work or types of work or to certain employees or types of employees; and