A) It must not conflict with any other indicator specified by the FCC rules or with any call sign prefix assigned to another country
Indicator. Words, letters or numerals appended to and separated from the call sign during the station identification.
The symbol "/" (which is pronounced "slash") is used to separate the indicator from the call sign. Examples:
- NJ2X/Portable or NJ2X/P
- NJ2X/Mobile or NJ2X/M