[(iii) which, in relation to the goods specified in the Third Schedule, involves packing or repacking of such goods in a unit container or labelling or re-labelling of containers including the declaration or alteration of retail sale price on it or adoption of any other treatment on the goods to render the product marketable to the consumer;]

and the word manufacture shall be construed accordingly and shall include not only a person who employs hired labour in the production or manufacture of excisable goods, but also any person who engages in their production or manufacture on his own account;]