Regulation 6 of the Principal Regulations is amended as follows:(a) by omitting from subregulation (1)(c) "450 cm 2 for each fowl" and substituting "550 cm 2 for each fowl, including the floor area under the baffle" ;(b) by inserting the following subregulation after subregulation (1) :(1A) Subregulation (1)(c) does not apply to a cage commissioned before 1 January 2001 if the floor area of the cage is less than 550 cm 2 for each domestic fowl, including the floor area under the baffle.