(a) When a person posts bail bond prior to a preliminary or commitment hearing and is later bound over to another court for trial, the original bail bond shall not terminate but shall be valid to provide for the person's appearance at the trial of the case unless the amount of the bail is set higher by lawful authority, in which case new bail bond shall be posted.

(b) Nothing contained in subsection (a) of this Code section shall apply to any proceedings in which any federal court or United States commissioner is involved. Subsection (a) of this Code section shall apply only to those instances wherein the person required to post a bail bond shall be bound over to a court or grand jury of the same county wherein the committing court exercised its jurisdiction. Subsection (a) of this Code section shall not apply to those instances where a person is bound over to two or more courts or grand juries.

(c) Nothing contained in subsection (a) of this Code section shall be construed to require an additional bail bond in the event the court to which the person has been committed requires a lesser bail bond than the bond originally posted.