The answer
Do not enter merely because the contract time has arrived or keys are physically nearby. Key release should follow the transaction's legal possession authorization and the communication process used by the lawyers and transaction representatives. Confirm the exact date and time, who authorizes release, where keys and codes are held, and the after-hours fallback.
Calgary-specific context
Condo elevator windows, loading docks, parking, fob pickup, locksmiths, cleaners, deliveries, movers, winter weather, remote travel, and a linked sale can all fail if they are booked as though possession authorization is guaranteed to be instantaneous.
What to do next
Put legal authorization, transaction confirmation, key location, codes, building access, movers, trades, and backup accommodation on one timeline; prohibit entry and work before authorization.
Verify before relying
Official sources for this topic
These sources explain the rules and records relevant to this topic. Check the current requirements for your property.
Check the current information at the linked source. Ask the appropriate professional how it applies to your property.
Important
Real estate rules, market conditions, property records, taxes, financing terms, bylaws, and physical conditions can change. Verify time-sensitive and property-specific facts with current official sources and the appropriate qualified professional before acting.