Like violating time constraints or special paperwork b/c new construction? 

Thus, a discriminatory effect resulting from a policy or practice that denies housing to anyone with a prior arrest or any kind of criminal conviction cannot be justified, and therefore such a practice would violate the Fair Housing Act.Policies that exclude persons based on criminal history must be tailored to serve the housing provider’s substantial, legitimate, nondiscriminatory interest and take into consideration such factors as the type of the crime and the length of the time since conviction.

Your best option, since your new tenant has intentionally violated the lease is to act accordingly.

What you're suggesting would be an ethical violation.

I am sure that this property has lots of code violations.  

Alternatively, factor it into your purchase price.The lease should end if the tenant violates the terms of the lease, just like any other lease (failure to pay rent, follow your rules, etc). 

We got a letter from the HOA with multiple "violations".

Problematic tenants, Co issues, violations on the house, extensive renovations, etc...

I reviewed the lease and there is a section saying "Landlord will try to give tenant 12 hour notice for any showings" which I believe violates the law requiring 24 hour notice to show property? 

This threat by them is probably a violation of licence law.I have some other ideas for you.