b'is charged. Section 222 also provides that the advertisement must be circulated at least one month before fixing the charges. Section 17(4) of the Public Health Act 1961 enables a local authority to recover expenses reasonably incurred in carrying out work to remedy defects in a drain, private sewer, water closet, waste pipe or soil pipe in default of the owner/occupier. Section 22 enables a local authority, on the application of the owner/occupier of any premises to undertake the cleansing or repair of any drains, water closets, sinks or gullies used or connected with the premises, as well as recover from the applicants such reasonable charge, if any, for doing so as it thinks fit. Section 67 of the Building Act 1984 enables a local authority, at the request of the occupier of any premises connected with a cesspool, sewer or drain, on which any work of maintenance, improvement or repair necessitating the disconnection of the sanitary conveniences provided for or in connection with the premises, is to be carried out by a local authority or by the owner or occupier of the premises, to supply on loan, temporary sanitary conveniences in substitution for any such conveniences so disconnected. Subject to the Act, the local authority may make reasonable charges for the supplying, removing and cleansing of any temporary sanitary conveniences lent under this section for more than seven days. This section also states when the authority cannot charge for the use of such facilities. Section 97 of the Building Act 1984 enables a local authority, by agreement with the owner or occupier of any premises, to execute at the owner/occupiers expense any work which it has under the Act required him to execute or any work in connection with the construction, laying, alteration or repair of any sewers or drains which he is entitled to execute. Section 100 of the Building Act1984 enables a local authority to sell any materials which have been removed by it from any premises, including a street, when executing works under the Building Act 1984 or otherwise carrying the Act into effect and which are not before the expiration of three days from the date of their removal, claimed by the owner and taken away by him. However, where such materials are sold it has to pay the proceeds to the person to whom the materials belong after deducting the amount of any expenses recoverable by it from him. Section 275 of the 1936 Act allows a local authority by agreement with the owner/occupier of any premises to execute at the owner/occupiers expense any work which the authority have, under the 1936 Act, required the owner/occupier to execute, or any work in connection with the construction, laying, alteration or repair of a sewer or a drain which he is entitled to execute, and for that purpose and the authority shall have all such rights as the owner/occupier would have. Under section 276 of the 1936 Act a local authority can sell any materials which have been removed by it from any premises, including any street when executing works under or otherwise carrying into effect the provisions of the 1936 Act and which are not, before the expiration of three days from the date of their removal, claimed by the owner and taken away by him. Where a local authority sells any material under this section it must pay the proceeds to the person to whom the materials belonged after deducting the amount of any expenses recoverable by it from him. Another default power is contained in section 6 of the Prevention of Damage by Pests Act 1949. This enables a local authority to reclaim their expenses reasonably incurred in taking steps to destroy rats or mice and keeping land free from rats or mice in default of action being taken by an owner/occupier of land. 157'