The attorney shall take charge of all suits and other legal matters to which the district is a party or in which it is legally interested. He shall give his advice or opinion in writing whenever required by the board. He shall be the legal adviser of the general manager and other district officers and shall prepare and approve the forms of all ordinances, resolutions, contracts, bonds, and other legal documents connected with the business of the district. He shall perform such other and additional services as the board may require.