Many high profile buildings are on the list including the Christ Church Cathedral, the Old Post Office building in Cathedral Square, part of Sol Square and the former IRD premises on Cashel St.
Owners were sent warning letters last week, offering guidance and listing enforcement options if they took no action.
The Frequency Media Group catalogue consists of a range of Hip-Hop, R&B, Reggae, Soul & Dance.
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GCSB had said that they didn't to break the law, so it shouldn't matter.
And New Zealand moved to change the law to expand GCSB's surveillance powers over New Zealanders in the future.
Air Chathams pioneered the transport of live crayfish from the Chathams Islands to mainland New Zealand, opening new markets and providing a vital key in the economic development of the islands.