First Time Homebuyer age 37

I have a 37 year old homebuyer who wants to take a distribution from her ROTH  401k -  buying her first home.  Is there a  dollar limit (besides 100% of her account) that she can take?  Is this exempt from the 10% penalty if it's her first home?   What if it's her second home?

What do the plan's document and procedures for in-service distributions say?

Again, check the doc. No she is not exempt. Does the plan allow for hardship withdrawals? She is too young for an in-service w/d. A hardship can only be taken for the amount needed.                                                   

No exemptions from a 401k account - only for an IRA up to $10k for a first-time homebuyer but that does not apply to 401k.