What are the requirements for facebook apps?

Question

Facebook

What are the requirements for facebook apps?
Hello!
I know that before publishing the application must be verified. But I would like to know
if it violates the rules before development
1 Where can I read what requirements apply to applications?
2 To whom and how can I ask a question?

Answer 1

To whom and how can I ask a question?

Facebook tech support is the most reliable addressee for such questions.

Answer 2

https://developers.facebook.com/policy/
Many nuances
For a new application, it is desirable to come up with a detailed explanation of what and why it needs