As I understand it, there is less requirement for security in Centre Block because members of Parliament and visitors to Parliament Hill and employees aren't over there. It's primarily going to be Public Services and Procurement Canada employees and the contractors who are there, so it's not the same requirement, although after the small leak we had, as you may recall, the cabinet was meeting there for a period of time, so that required some personnel there during that relatively short period.
On February 19th, 2019. See this statement in context.