(1) For certain homogeneous works, unique norms and standard norms (interbranch, branch, professional, etc.) of work can be elaborated and established. The standard work norms are elaborated by the specialized central public administration authorities in agreement with the respective employers' associations and trade unions and are approved in the manner established by the Government.

(2) The replacement and revision of the single rules and the standard rules shall be carried out by the authorities that approved them.