I am thinking long term, and when I am older, I would like to be able to drop trips so I can take a nap on my sofa instead of flying.

I heard something about being able to drop your credit to 60-70 hours. Is that true? If so, is there language in the contract that allows the company to say, nope not enough coverage!
Also, what is the commuter policy? Any minimum daily guarantee hours?
Thx
Happy
PS I know the minimum guaranteed days off, but Ive heard that junior people are getting 15-18 days off per month. Any truth in that?