Fair Housing Act: Federal law prohibiting discrimination in housing transactions, including leasing. Must be considered when extending lease terms to ensure compliance with anti-discrimination provisions.

Americans with Disabilities Act: Federal law requiring accessibility considerations in commercial properties. Relevant when extending commercial lease terms to ensure continued compliance with accessibility requirements.

Federal Lead-Based Paint Disclosure: Federal requirement for disclosure of lead-based paint hazards in residential properties built before 1978. Must be maintained and potentially renewed with lease extensions.

State Landlord-Tenant Laws: State-specific laws governing the relationship between landlords and tenants, including requirements for lease modifications and extensions.

State Property Laws: State-specific regulations governing real property transactions and agreements, including requirements for lease amendments.

State Lease Requirements: Specific state mandates for lease agreements and their modifications, including any required terms or disclosures for lease extensions.

State Registration Requirements: State-specific requirements for registering or recording lease amendments with appropriate government offices.

State Rent Control Laws: State regulations governing rent increases and lease modifications in rent-controlled properties, if applicable.

Local Housing Codes: Municipal regulations governing property conditions and maintenance standards that must be maintained throughout the extended lease term.

Local Zoning Ordinances: Municipal regulations governing property use and occupancy that must be considered when extending lease terms.

Local Rent Control Ordinances: Municipal regulations affecting rent increases and lease modifications in specific localities, if applicable.

Local Registration Requirements: Municipal requirements for registering or recording lease amendments with local government offices.

Statute of Frauds: Common law principle requiring certain contracts, including lease modifications, to be in writing to be legally enforceable.

Contract Modification Principles: Legal requirements for valid modification of existing contracts, including necessary elements like mutual agreement and consideration.

Execution Requirements: Legal requirements for proper execution of lease amendments, including signature requirements and potential need for notarization.