Information on appeals, variances and extensions of time can be referenced in the Pennsylvania Code, Title 34, Section 403.122 of the Uniform Construction Code. Beginning Date of Delay -.This request is more formal than the notice of delay, and the actual procedure to request a time extension should be outlined in the contract. Similar to Missouri, Pennsylvania courts may not permit a contractor to extend the time for filing a lien under certain circumstances. When a construction project does not meet its promised completion date, it can lead to legal consequences. A time is of the essence clause can leave a contractor liable for damages in the event of delay, even if the contractor did not cause the delay. An Extension of Time, for such reasonable time as the Funding Agency may determine. Understanding contractor liability is crucial when dealing with construction projects in the Keystone State. Refer to Chapter 8 for relevant requirements and to see how to fill out these screens.