(a) A person who is detained or objects to the conditions required for his release which were imposed or allowed to stand by order of a district court judge may apply in writing to a superior court judge to modify the order.
(b) The power to modify an order includes the power to substitute sureties upon any bond. Substitution or addition of acceptable sureties may be made at the request of any obligor on a bond or, in the interests of justice, at the request of a prosecutor under the provisions of G.S. 15A-539.