(1)  The appropriate regulatory authority may vary a licence (including the conditions of a licence).

(2)  A variation includes the attaching of a condition to a licence (whether or not any conditions have already been attached), the substitution of a condition, the omission of a condition or the amendment of a condition.

(3)  A licence may be varied on application by the holder of the licence or on the initiative of the appropriate regulatory authority.

(4)  A licence may be varied at any time during its currency, including on its being transferred to another person.

(5)  A licence is varied by notice in writing given to the holder of the licence.

(6)  If—

(a)  the variation of a licence will authorise a significant increase in the environmental impact of the activity authorised or controlled by the licence, and

(b)  the proposed variation has not, for any reason, been the subject of environmental assessment and public consultation under the Environmental Planning and Assessment Act 1979,

the appropriate regulatory authority is to invite and consider public submissions before it varies the licence.