The Leeds Supertram Act was passed in 1993 to allow the construction of a new tram network in Leeds.
Sections 14 prevents work from starting without the consent of Central Government. (Irrespective of how the tram network will be funding, -publicly or privately).
Section 17 allows the Executive (West Yorkshire Metro) and Leeds City Council to build a trolleybus network or similar system instead of a tram network. Removing Section 17 would ensure that Leeds was able to build a suitable tram network.
There should not be a restriction on the commencement of the scheme by Central Government if a local Government or a private business (as permitted by section 66 of the Act)