Amendments to the principal Regulations

6.  In regulations 5 to 17—

(a) for “these Regulations”, in each place it occurs, substitute “this Part”;

(b) for “undertaker”, in each place it occurs, substitute “Welsh undertaker”;

(c) for “water undertaker”, in each place it occurs, substitute “Welsh water undertaker”; and

(d) for “sewerage undertaker”, in each place it occurs, substitute “Welsh sewerage undertaker”.