Is it legal to copy a tweet to multiple other owned twitter accounts


I’ve been brought on by a client to automate this task with a bot:

There is a Main Twitter Account and a Twitter Account for each state (USA) all owned by the client.

If Main Twitter Account tweets, all other Twitter Accounts will retweet the original tweet.

Is this legal by terms of Twitter or not? I’ve seen this done elsewhere, but Twitters terms seem to be against it. Can someone help me clarify officially? The last thing I want to do is have my clients Twitter account banned.