Comment: here is a key statement from their party rules:

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here is a key statement from their party rules:

b. Length of Commitment:

A person who is elected as a delegate or alternate to the National Convention and who is assigned to a Presidential candidate to represent that particular Presidential candidate at the National Convention and who does not resign from the position is pledged to support that Presidential candidate at the National Convention until the candidate is nominated or until the delegate or alternate is released from the pledges as follows:

1. First (1st) nomination convention ballot: delegate or alternate shall be released from the pledge only in the event of death, withdrawal, or by decision of the candidate. For the first ballot taken at the National Convention to determine the nominee of the Republican Party for the office of President of the United States, the totals of the votes of the members of the Texas
delegation shall be announced as they would have been if the individual delegates had been awarded to or designated for the respective candidates for such office on the Texas General Primary ballot in accordance with the statewide result of the voting for such candidates. No poll of the members of the delegation, except as provided below, shall be taken for the announcement of the vote. Uncommitted delegates, including the delegates who are members of the Republican National Committee, shall be polled by the chairman of the delegation prior to the announcement of the vote and the vote announced shall include the votes of those delegates.

2. Second (2nd) and subsequent nominating convention ballots: delegates and alternates are released from any pledge and may vote as they choose on all questions and candidates presented at the National Convention.

In other words, no bound delegates do any voting on the first ballot anyway. The first ballot vote is automatic for most of the Texas delegation. Only the candidates that are officially uncommitted cast ballots, and these are added to the automatic votes to produce the total. On the second ballot, all delegates can vote for anyone they want. So there's not ever a chance for any bound Texas delegate to cast a vote, thus no chance to break the binding. Breaking delegate binding is thus an impossible crime to commit, so I wouldn't be surprised if there weren't any enumerated penalties for doing it.