and i think maybe mr. smoak can answer this. i believe it's not even in our rent control ordinance. it's costa hawkins about what size of renovation causes that trigger of being no longer a 1979 unit. >> thanks for the question. joseph smoak from housing rights committee san francisco. so i have spoken with representatives at the department of building inspection and the rent board about this issue because we are seeing it all over the city right now and discussion with the residential expansion threshold which came before you as a policy matter last year. it's a little disconcerting. it's taken on a case by case basis by the rent board and d.b.i. what we are concerned about the extent of renovations with this particular project it would be considered. even if it's not a demolition per d.b.i. because they don't really rule on that. they won't allow the building to be occupied until there's a new certificate of occupancy and that's what d.b.i. has told us. we are participants in the outreach program. a lot of our colleagues in this city who do tenants rights work, so we have direct a