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While Elon Musk has a history of playing by his own rules, the San Francisco Department of Building Inspection has forced him to abide by municipal real estate codes.

According to an Associated Press report, the brightly flashing “X” sign that Musk erected last Friday on top of the headquarters of the company formerly known as Twitter has been taken down. The city department said it received 24 complaints about the sign regarding its bright illumination and potential structural safety. The sign was put up without a permit from the city.

This is the second time that Musk ran afoul with the city regarding the headquarters building. Last week, his company began removing the Twitter sign and its blue bird logo from the side of the building, but work was halted due to Musk’s failure to secure the necessary permits.

Musk acquired Twitter last year in a $44 billion deal and recently began to rebrand is as “X.” However, the platform still operates as Twitter.com.

Photo by Steve Jurvetson / Flickr Creative Commons