(a) A tribunal in Georgia may exercise jurisdiction to establish a support order if the petition or comparable pleading is filed after a pleading is filed in another state only if:

(1) The petition or comparable pleading in Georgia is filed before the expiration of the time allowed in the other state for filing a responsive pleading challenging the exercise of jurisdiction by the other state;

(2) The contesting party timely challenges the exercise of jurisdiction in the other state; and

(3) If relevant, Georgia is the home state of the child.

(b) A tribunal in Georgia may not exercise jurisdiction to establish a support order if the petition or comparable pleading is filed before a petition or comparable pleading is filed in another state if:

(1) The petition or comparable pleading in the other state is filed before the expiration of the time allowed in Georgia for filing a responsive pleading challenging the exercise of jurisdiction by Georgia;

(2) The contesting party timely challenges the exercise of jurisdiction in Georgia; and

(3) If relevant, the other state is the home state of the child.