1. For the purposes of this Regulation,(1) “harvest year” means the period extending from 1 April to 31 March of the following year;
(2) “reference period” means the period extending from 1 April to 31 December of the following year;
(3) “billed volume of timber” means, for the harvest years 2011-2012 and 2012-2013, all the timber from forests in the domain of the State that is billed to the holder of a timber supply and forest management agreement by the department and, for subsequent harvest years, all the timber from forests in the domain of the State that is billed to the holder of a timber supply guarantee by the timber marketing board, except timber acquired on the open market.