The trust contract determines, on pain of nullity:
1° The assets, rights or securities transferred. If they are future, they must be determinable;
2° The duration of the transfer, which may not exceed ninety-nine years from the signing of the contract;
3° The identity of the settlor or settlors;
4° The identity of the trustee or trustees;
5° The identity of the beneficiary or beneficiaries or, failing that, the rules allowing their designation;
6° The mission of the trustee or trustees and the extent of their powers of administration and disposal.