Okla. Stat. tit. 41, § 41-126: Tenant's use and occupancy of premises - Rules and

regulations.

A. A landlord, from time to time, may adopt a rule or

regulation, however described, concerning the tenant's use and

occupancy of the premises. Such a rule or regulation is enforceable

against the tenant only if:

1. Its purpose is to promote the convenience, peace, safety or

welfare of the tenants in the premises, preserve the landlord's

property from abusive use, or make a fair distribution of services

and facilities held out for the tenants generally; and

2. It is reasonably related to the purpose for which it is

adopted; and

3. It applies to all tenants in the premises in a fair manner;

and

4. It is sufficiently explicit in its prohibition, direction or

limitation of the tenant's conduct to fairly inform the tenant what

such tenant must or must not do to comply; and

5. It is not for the purpose of evading the obligations of the

landlord; and

6. The tenant has notice of it at the time such tenant enters

into the rental agreement, or when it is adopted.

B. If a rule or regulation is adopted after the tenant enters

into the rental agreement and that rule or regulation works a

substantial modification of such tenant's bargain, the rule or

regulation so adopted is not valid and enforceable against the

tenant unless he consents to it in writing.