Section 2(1)(m) in Punjab Regulation of Wood Based Industries Rules, 2019
(m)'Secondary units' means those units which take wood from primary units for further storage and processing such as mills that produce Medium Density Fibreboard, Particle Board, Block Board, Paper Pulp, Rayon, plywood pasting units without peeling, Katha Bhatties using boilers conforming to Indian Boiler Regulations (IBR) etc. and shall also include the units which are categorised as secondary units by the State Level Committee from time to time;