Why it matters
Entity status, accepted confirmations, band or mode endorsements, and application rules are controlled by the current program criteria.
Use it correctly
Use the current entity list and rules, log accurately, preserve accepted confirmations, and resolve callsign or location questions before applying.
The common mistake
Counting countries from a map and assuming every one is a separate DXCC entity.
Current regulation, program rules, manufacturer limits, exact station configuration, and live observations control. Recheck changing rules, solar conditions, and operating status before acting.