b'Section 171 enables an authority to remove building material, rubbish, etc in a street or to fill in excavations in a street and to have discretion whether to levy reasonable charge on anyone responsible. Sections 176 to 180 inclusive and section 195 (subject to below) deal with local authorities powers to carry out works to bridge structures, including maintenance and strengthening works. Section 176 gives an authority discretionary power to recover legal and other expenses incurred in granting a licence to construct a bridge over a highway. Section 177 gives a similar power to recover reasonable expenses incurred in granting a licence to construct a building over a highway and section 179 enables an authority to remove, alter or otherwise deal with works which have been illegally constructed under a street and to recover expenses. Section 180 enables an authority to repair vaults, arches and cellars under street openings and contains a default charging power. Section 180 of the 1980 Act also enables an authority to impose reasonable charges for the repair of pavement lights in streets. Section 187(7) of the 1980 Act has been repealed by the Planning and Compensation Act 1991 but with similar saving provisions to section 195 as above in that orders made whilst section 187 was in force remain valid, etc. The section itself allowed an authority to recover expenses reasonably incurred in carrying out works where an occupier of premises adjoining or having access to the highway habitually crossed the footway and the authority issued a notice stating that it proposes to execute work to install a vehicle crossover. Section 195 is a curious provision in that while the section has now been repealed its legacy lives on. Any order made whilst the section was still in force remains enforceable together with any local authority powers which were exercisable in respect of any such order. Section 195 itself enabled an authority to remove, alter or pull down a bridge carrying a new street not approved or not constructed under statutory powers and to recover costs at its discretion from anyone responsible. Section 69 of the Road Traffic Regulation Act 1984 (the 1984 Act) enables an authority to remove unauthorised direction signs and recover expenses in default of the person responsible for placing such signs on the highway. Sections 48 to 52 of the New Roads and Street Works Act 1991 (the 1991 Act) contain provisions enabling county councils to employ district councils as their agents for all street works functions, whether they have these functions as street authorities or as local highway authorities. Section 94 of the 1991 Act gives a street authority or a district council power to enter into an agreement with a statutory undertaker for the execution by the authority or council on behalf of the undertaker of any street works subject to such terms as to payment or otherwise as the parties may deem appropriate. This is without prejudice to any powers which the authority may have apart from this section, eg as agent for a sewage authority. The purpose of the section is to enable local authority Direct Labour Organisations (DLO) to continue to engage in agency works despite the fact that such work is now the responsibility of statutory utilities. Because it is unusual for local authority DLOs to have this power there is a power reserved for the Secretary of State to terminate the section by an Order subject to the negative resolution procedure in Parliament. The power given to the street authority under this section is to act as a contractor to the undertaker and is not a power to take over the undertakers statutory responsibilities.122'