An electrical system is not considered to have been transferred for operational purposes simply because a file has changed hands. What matters is the change in actual control of the system and its operational status.
It takes months to plan, procure, set up, and commission a new production facility. Nevertheless, the electrical layout of the facility is sometimes not considered until shortly before completion.
Many companies have a group-wide electrical safety standard, often supplemented by authorization procedures and access restrictions via lockout/tagout. This is a valuable starting point.
