Okla. Stat. tit. 60, § 60-326: Perpetuities and restraints on alienation

No retirement, pension or profit sharing plan, qualified for tax

exemption purposes under present or future Acts of Congress, or any

trusts, insurance and annuity contracts constituting a part thereof,

shall be construed as violating the rule or law against

perpetuities, or any rule or law against restraints on alienation;

provided the power of alienation or the vesting of the interest of

any person in such plan, trust or contract shall not be suspended

for a longer period than the duration of the lives of the designated

beneficiaries of such particular interest, in being at the time of

designation, plus twenty-one (21) years.