 The statutory instruments made in 1962–65 under the 1960 Act were separate for each local authority, setting the level of fluoride in drinking water to 0.8–1.0 ppm.The current regulations date from 2007, and set the level to 0.6–0.8 ppm, with a target value of 0.7 ppm.Implementation of fluoridation was held up by preliminary dental surveying and water testing, and a court case, "Ryan v. Attorney General".