Service of stop work order. The CEO shall cause the stop work order,
or a copy thereof, to be served on the owner of the affected property
(and, if the owner is not the permit holder, on the permit holder)
personally or by registered or certified mail. The CEO shall be permitted,
but not required, to cause the stop work order, or a copy thereof,
to be served on any builder, architect, tenant, contractor, subcontractor,
construction superintendent, or their agents, or any other person
taking part or assisting in work affected by the stop work order,
personally or by registered or certified mail; provided, however,
that failure to serve any person mentioned in this sentence shall
not affect the efficacy of the stop work order.