61.89 prohibits a student pilot from acting as PIC "In a manner contrary to any limitations placed in the pilot's logbook by an authorized instructor." Your instructor can place additional restrictions on your solo endorsement, although it's probably rare. If your instructor wants to put you on a leash, he or she can!
Suggestion: Follow Gajre's advice and keep an open dialog with the instructor who endorsed your solo privileges. It's wise to talk to your CFI and apply a "sanity check" to your flying plans as you gain more experience. Enjoy!
Last edited by OSAVIP; 03-03-2012 at 03:26 PM.
Reason: typo