b'be necessary or expedient, with regard to any waterway in the park, for facilitating the use of the waterway by the public for sailing, boating, bathing or fishing or other forms of recreation. Authorities may also enter into agreements with other authorities, on terms as to the payment or otherwise as may be specified, to carry out these functions. Section 21 enables local authorities to establish nature reserves and to enter into agreements with any drainage authority for the exercise by the drainage authority, on terms as to the payment or otherwise as may be specified, for doing work by the authority under this section. Section 89 of the 1949 Act enables a local planning authority to plant trees on land in its area for the purposes of preserving or enhancing the natural beauty thereof and to enhance derelict, neglected or unsightly plots of land. Under section 89(3) the powers conferred by this section may be exercised by an authority either on land belonging to it or, with the consent of all persons interested, on other land and, in relation to such other land, these powers include power to make arrangements whereby the planting or work is carried out, on such terms as may be provided under the arrangements, by a person other than the authority. Under section 24 of the Caravan Sites and Control of Development Act 1960, local authorities (which includes county councils, joint boards for national parks and metropolitan districts) have powers within their area to provide caravan sites, whether for holidays or other temporary purposes or for use as permanent residences, and to manage the sites or to lease them to some other person. The local authority also has power to do anything appearing to it to be desirable in connection with the provision of such sites and to provide services or facilities for persons using the caravans for their health and convenience. Under section 24(3), the local authority shall make in respect of the use of the site managed by it, and any of the services or facilities provided or made available under the section, such reasonable charges as it may determine. Useful provisions are contained in the Countryside Act 1968. County councils, district councils, the Common Council of the City of London and borough councils have power to provide country parks on any site in the countryside appearing to them to be suitable to be adapted to provide a country park. Section 7 gives the local authority power to extend, maintain and manage a country park and to do all other things appearing to it to be desirable in connection with the provision of the park and, in particular, to layout, plant and improve the site, to erect buildings and carry out works, to provide facilities and services for the enjoyment or convenience of the public, including providing meals and refreshments, parking places for vehicles, shelters and lavatory accommodation, and to provide facilities and services for open air recreation. There is a proviso which states that the authority shall not, under this section, provide accommodation, meals and refreshments except in so far as it appears to it that the facilities within the country park are inadequate or unsatisfactory, either generally or as respects a description of accommodation, meals or refreshments, as the case may be. Section 8 of the 1968 Act enables an authority to provide facilities and services for sailing, boating, bathing and fishing in any waterway in a country park. If the country park is bounded by the sea the authority has power to carry out such work and to do such things as may appear necessary or expedient for facilitating the use of waters by the public for sailing, boating, bathing and fishing and other forms of recreation. This section is silent on the issue of whether charges can be imposed for the use of these facilities once provided, but there are charging powers in other statutes which may be utilised (eg section 19 of the Local Government (Miscellaneous 139'