Contact Housing Authority to report the situation? 

At the end of the day the bank WILL have the authority to call the loan so watch out. 

The key is an active, full time, live on the premises manager, with heavy experience with these type of tenants, a good relationship with the political municipal authorities, and keeping the place spotlessly clean while attending needed repairs immediately, bit inexpensively.

I would go to the local authority/municipality that would have issued the permit(s) and ask them?

If you read the regulations that you posted:"The name, address, and telephone number of the authorized manager of the rental property and an owner (or an agent of the owner) who is authorized to receive legal notices for the owner"Notice that it refers to the agent of the owner. 

If you adhere to the safe harbor of rev proc 2002-22 there will be some governance and authorization hurdles you'll have to overcome to ensure that majority ownership can refinance. 

If you adhere to the safe harbor of rev proc 2002-22 there will be some governance and authorization hurdles you'll have to overcome to ensure that majority ownership can refinance.

There is an addendum called the HAP agreement that is added to the lease between the housing authority and landlord that you’ll want to make sure to get a copy of and that is what you utilize for the housing terms and rules/regs. 

The Landlord may take advantage of any other remedy which is authorized by law, and may combine any and all available remedies in order to make sure that the Landlord is fully compensated for the Tenant's Default.

The taxing authority does not have to file anything in order to attach it.