Mississippi Code Title 89. Real and Personal Property § 89-25-7

(a) A nonvested property interest or a power of appointment becomes invalid under Section 89-25-3;

(b) A class gift is not invalid, but might become invalid under Section 89-25-3, and the time has arrived when the share of any class member is to take effect in possession or enjoyment;

(c) A nonvested property interest that is not validated by Section 89-25-3(1)(a) can vest but not within ninety (90) years after its creation; or

(d) In the case of a trust which otherwise meets the requirements of Section 89-25-9(h), all beneficial interests in the trust can vest or the trust can terminate but not within three hundred sixty (360) years.