Yes. Under Clause 52.17 of the Northern Grampians Planning Scheme, a permit is required to remove, destroy or lop native vegetation on your property. The terms remove, destroy or lop include mowing, slashing, spraying with herbicide, pruning, digging out, raking, burning or the removal of timber.
Clause 52.17 of the Planning Scheme contains a list of exemptions. Check with the council to determine if your proposed works are exempt from the provisions.
If you are unsure, please contact the council for guidance.