You can even go to the door, knock and ask for permission to enter.

As an example, mine reads:LESSEE(S) agree(s) not to rent, sublet, or in any way assign the right to reside in the dwelling or any portion thereof, without permission from LESSOR at which time the Rental Agreement may be altered to reflect LESSEE(S) changes or additions of residents.

You could bring an Ipad or laptop with you and allow him that to complete the application and give permission to run a screening report.

If it says they can't do any work estimated to cost more than $500 without written permission, then they are in violation.

Do they need permission from the city to cut a 100 year old tree that is solely on their property (not on street)?

(ask their permission to collect a lead)May I have your Name , phone number, email address, best time to call, etc.OK tell me whats going on with your house?

We have 2 dogs we didn't need permission to get, we just renovated my sons bedroom, we landscaped our yard, we had an overnight BD party and didn't have noise complaints, etc.  

I got permission and showed up to former landlords building.

The house has what the house has, you are welcome to upgrade it with my permission, in a professional manner with all improvements staying but this is a RENTAL not their personal house.You don't upgrade it for their taste but for the future rental value of the house.

"You gave us permission" they say.