It's a good point: everyone should check out their current ordinance to comply with. 

Serve him 10 day notice to comply?

So best practice is to really stick it to the seller and make them comply all the way until closing when motivation is highest.If you are paying all cash then everything is an option for you as to what to do with reports,risk levels,etc.If you are getting a loan the lender will require their checklist to fund a loan.

I have an air purifier that requires new filters every six months and I’m never on it enough to comply.

You will comply with all laws and regulations regarding the Dwelling.

Get a letter from your heating contractor stating the baseboard heating is owner,  paid not on her electric service, and iinclude instructions for proper use, That tampering with the heating system is a lease violation and any damages caused from her not complying will be held liable for. 

I am ready to get this process underway but, I don't have a purchase and sale agreement that complies to the laws and regulations of Pennsylvania.

As far as payment schedules , I simply comply with the laws of Maryland . 

If your chosen agent isn’t complying with your request I would definitely regroup and find an alternative.

Egress point is necessary from the bedroom.. so if it's a studio,, you'd need a egress window in the unit, another exit, from basement is always good option.House hack and live in basement is an option.. but legally if someone ever was renting down there and had a fire / emergency / was injured  they would OWN you.Also Extremely likely that when your building is inspected / for rental license renewal the person doing inspection is gonna want to see the basement.. only a matter of time until they figure out what's up as a additional living space and you'd be required to comply with what ever they want corrected or face fines and rental license revocation.