The District of Columbia Code Title 42 Chapter 32 Section 8 outlines the following right for landlords and tenants to mutually agree to different requirements for providing notice to terminate tenancy:
Parties May Agree to Alternate Notice Provisions
Nothing herein contained shall be construed as preventing the parties to a lease, by agreement in writing, from substituting a longer or shorter notice to quit than is above provided or to waive all such notice.
DC Code § 42–3208.
See also DC How to Serve a Notice to Quit.