revision preference src: These exceptions notwithstanding, tariff increases are the rule over the long term. However, initial tariffs have been well below cost recovery levels in almost all cases, sometimes covering only a fraction of the cost of service provision. <SEP> tgt: These exceptions notwithstanding, tariff increases are the rule over the long term. Initial tariffs have been well below cost recovery levels in almost all cases, sometimes covering only a fraction of the cost of service provision.