Both units are unoccupied.
The owner of the unit on the left hires a gardener to keep the lawn neat and tidy. Goody two shoes.
The owner of the unit on the right does not care that the grass is liable to be a nuisance to the neighboring lots.
GCD is entitled under the Deed of Mutual Covenants (bye-law 18, Third Schedule) to cut the grass and all costs incurred by GCD in the abatement of such nuisance shall be borne by the owner of the lot. This provision is being ignored by GCD because they can as their failings go unpunished by the owners.
GCD is quick to quote chapter of verse of the DMC when writing to owners demanding for overdue charges but is entirely happy to ignore the provisions of the DMC when real work is required.
Owners should not stand for such selective application of the DMC. This is why some owners have refused to pay up.