Unlock time allows you to send a transaction to someone, such that they can not spend it until after a certain number of blocksblock height, or until a certain time. These locks are per transaction, not per output. This means any returning change will be locked too. ***Do not unintentionally lock your change outputs.***
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number of blocksblock height, or until a certain time. These locks are per transaction, not per output. This means any returning change will be locked too. ***Do not unintentionally lock your change outputs.***