旧的广告牌把新的广告牌给安上

It should not be necessary if the pattern is the same, but if the pattern is inconsistent, it needs to be re-approved

This law and regulation should stipulate that the replacement of signboards requires the approval of the urban management office, but you'd better inform them. The city management may actually have the authority to change the signboard. The signboard is the facade of your store and the business district. If you change it casually, it may affect the image of the entire business district. Secondly, the size and safety of the signboard are all required. There should be no special laws and regulations, but there are applicable provisions in the fire protection law, etc. Third, if the number of words in your sign is different from the original one and the style violates public order and good customs, the urban management must take care of it.