Many states have no “rule against perpituties”
“in the United States it has been abolished by statute in Alaska, Idaho, New Jersey, Pennsylvania,[6] Kentucky,[7] Rhode Island [8] and South Dakota”
Also many more have established a 90 year vesting rule, say you leave to all your grandchildren and it vests back outside of trust many years after last one has died but within this limit. The last of those remaining from a beneficiary class as it’s known plus a period of time is permitted. It used to be 21 years in English law. Many old trusts are written that way. The trust assets are to be paid out with per stirpes or per capita, 21 years following the death of the last remaining person of alive as of x date (currently). Smart folks used ver young people as that class.
Here’s the list of states with long extensions.
“The Uniform Statutory Rule Against Perpetuities validates non-vested interests that would otherwise be void as violating the common law rule if that interest actually vests within 90 years of its creation;[10] it has been enacted in 29 states (Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia, Hawaii, Indiana, Kansas, Massachusetts, Minnesota, Montana, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, North Dakota, Oregon, South Carolina, South Dakota, Tennessee, Utah, Virginia, Washington, West Virginia), the District of Columbia, and the U.S. Virgin Islands, and is currently under consideration in New York.[11][12]