Signed into law on April 24, 2020, but retroactive to April 7, 2020, Ordinance 68-20 temporarily suspends certain rent increases during the Mayor’s eviction moratorium prompted by the COVID-19 epidemic. The suspension applies to increases under Section 37.3(a) of the Rent Ordinance (which covers annual allowable increases, as well as any banked increases from previous years, and various passthroughs).
Now, it’s questionable whether even the Mayor’s emergency powers under the San Francisco Charter permit retroactive laws, though they may permit immediate ones. And otherwise, the authority of local governments to manipulate landlord’s state law procedural protections is strictly limited. Cities also lack authority to impose rental rate restrictions that prevent rents from keeping pace with inflation.
That said, Ordinance 68-20 contains specific references to the “anniversary date not being affected by deferral of the increase”. Likewise, it states that the right to impose the increase shall “immediately resume” when the moratorium expires. Likely, a landlord may send the increase, preserve the anniversary date, and simply not require the additional payment.