“Dear Landlord, I noticed this month a 6% increase in rent without proper 60-day notification. Per (insert link to whatever law it is) you must provide this 60-Day notification. I am ok with the 6% rent in 60 days but will be paying my current rent untill then. Please let me know if you have any issues, if so I will have to reach out to (insert name of whatever entity).” Just double check you didn’t miss a piece of mail or email with it months ago. I am in Seattle and moving to DC this month and we have the same rules btw.