Sure, no problem. It means angels laid out the law in an orderly manner for Moses so he could write it down. Notice that the law was
until Christ, meaning it was temporary.
Why then the law? It was added because of transgressions, until the seed should come to whom the promise was made; and it was ordained by angels in the hand of a mediator. Now a mediator is not a mediator of one, but God is one. Galatians 3:19-20
Ordained
G1299 διατάσσω diatasso (d̮iy-a-tas'-sō) v.
1.
to arrange thoroughly.
2. (specially) institute, prescribe, etc.
[
from G1223 and
G5021]
G5021 τάσσω tasso (tas'-sō) v.
1.
to arrange in an orderly manner.
2. (generally) to assign or dispose (to a certain position or lot).