ground rule

Noun

 * 1)  A rule regarding play on a specific field, course, or court.
 * 2)  The basic rules or standards; whatever someone must know before proceeding.
 * Make sure everybody knows the ground rules for the trip before they leave.
 * Make sure everybody knows the ground rules for the trip before they leave.

Translations

 * Finnish: perussääntö
 * Hungarian: