Basic Qualification · B-001 Regulations and policies · B-001-007-007
What are the restrictions on the use of abbreviations or procedural signals in the amateur radio service?
- A They are not permitted because they obscure the meaning of a message to government monitoring stations
- B Only "10 codes" are permitted
- C They may be used if the signals or codes are not secret
- D There are no restrictions
Correct answer: C — They may be used if the signals or codes are not secret. From the official ISED question bank, verified word for word.
Why
You can use abbreviations or procedural signals as long as no one is trying to hide the meaning from others; the rule simply forbids secret codes that obscure communication from government monitors or fellow operators. The full explanation — and one for every question — is in Pro.
Practise this section
The rules: who may operate, what the certificate allows, station identification, third-party traffic, what you may and may not transmit, and how ISED regulates the amateur service.