57. The Authority must—
(a)by 15th March, 15th June, 15th September and 15th December in each year (“the tariff publication date”) publish in a table the initial tariffs applicable where a tariff start date falls within the tariff period immediately following the relevant tariff publication date; and
(b)on or before 1st April each year, publish in a table on its website the subsequent tariffs applicable for the period commencing on 1st April of that year and ending with the 31st March of the following year.