(a) Provisions in bonds stipulating the damages to be paid in the event of breach shall be deemed penalties and shall not be enforceable unless the amount stipulated is reasonably related to the amount of the loss resulting from the breach and the damages resulting from the breach are uncertain in nature or amount or are difficult of ascertainment.

(b) Where provisions in bonds stipulating damages to be paid in the event of breach do not comply with the requirements prescribed in subsection (a) of this Code section, only actual damages shall be recoverable in the event of a breach.