Actually they do have a choice. This is from the contract. Section 24 G

1. The Company may waive any or all equipment freezes on a uniform and non-discriminatory basis.
2. A Pilot who is involuntarily Displaced shall not be subject to a freeze.
3. A Pilot may bid and be awarded a change in Domicile at any time.
4. A Pilot subject to an equipment freeze will be released from such freeze to prevent the hiring of a Captain off the street.