Are certain restrictions laid off to those who their birth dates landed on the leap year Feb. 29?

No lol. Even though yes in a literal sense she is not having birthdays she is still ageing and an amount of years have literally gone by even though her birthday is being ped over. They will let her drive, they will let her buy smokes when shes 18 even if shes born on a leap year and drink when shes 21 because they go by the year you were born, yes the day matters too but in law terms they cant restrict someone for being unlucky enough to have a birthday rolling around every for years and they dont. I guess if her 21'st birthday was not on a leap year they would just have to let her celebrate it a day early or wait until the next day but no restrictions would apply due to this i promise you even the law wont stop her.