Section 61 of the Principal Act is amended as follows:(a) by omitting from subsection (1) "or category of minerals from the minerals or category of minerals to which the licence relates" and substituting "from the licence" ;(b) by omitting paragraph (b) from subsection (2) and substituting the following paragraph:(b) adding or removing a mineral from the licence.(c) by omitting paragraph (c) from subsection (3) and substituting the following paragraph:(c) removing a mineral from the licence.