Code 20

A message announced over a hospital’s public address system warning the staff of mass casualty, not exceeding 20 people
References in periodicals archive ?
The modular design enables the use of Code 20, Code 200, and Code 300 series racks.
If anyone wishes to buy a brick or make a donation electronically, the campaign account number is 70893633 with sort code 20.50.94 at Barclays Bank, West Derby branch.