Section 2 of the Act of 2004 is amended -

(a) by the insertion of the following definitions after the definition of "built up area":

"'chief executive', in relation to a county council or city council, means a chief executive for the purposes of section 144 of the Local Government Act 2001;

'Chief Executive of the National Roads Authority' means a person -

(a) directed under section 28(1)(b) of the Roads Act 1993 to perform the functions referred to in section 29(2) of that Act, or

(b) appointed under section 29 of the Roads Act 1993;",

(b) by the insertion of the following definition after the definition of "Minister":

"'national managed road' has the same meaning as it has in the Roads Act 1993;",

and

(c) by the insertion of the following definitions after the definition of "Principal Act":

"'road works speed limit' means a speed limit applied by -

(a) the chief executive of a county council or a city council under section 10, or

(b) the Chief Executive of the National Roads Authority under section 10A;

'road works speed limit order' means an order made by -

(a) the chief executive of a county council or a city council under section 10, or

(b) the Chief Executive of the National Roads Authority under section 10A;