Is it permissible to cede the guardianship of marriage (wilāyat al-tazwīj) to the paternal uncle in the event of the father's death?

The brother takes precedence over the paternal uncle in guardianship for marriage, being the closest of the agnates after the direct lineal ascendants. It is not permissible for one who possesses guardianship for marriage to relinquish it, but it is permissible for him to delegate someone else, provided that the代理 (agent) is qualified for guardianship.