Non$-$compliance with the internal governance rules may amount to a procedural irregularity. What is the legal consequence of a procedural irregularity?

Group of answer choices

The proceeding is automatically invalid.

If an application is made to the court by an affected person, the proceeding will be automatically declared invalid.

If an application is made to the court by an affected person, the proceeding may be declared invalid if the irregularity has caused or may cause substantial injustice.

The proceeding is still valid.