Simplify the following text for a Grade 14 native English-speaking person.
Original: A number of rules have developed which detail what must be done when one or both of the cue ball and fifteenth object ball are either in the rack area at the time an intragame rack is necessary , or are in such proximity to the intragame racking area , that the physical rack can not be used without moving the one or the other .
Simplified: A number of rules detail what must be done when one or both of the cue ball and fifteenth object ball are either in the rack area at the time an intragame rack is neeeded , or are so close to the intragame racking area , that the racking of the 14 balls can not be done without moving one of them .