Adjudication Part 4 – What Is The Slip Rule?

The Adjudication Part 4 slip rule allows an Adjudicator to correct any accidental errors or omissions in their decision. For example, if an Adjudicator makes a mathematical error, they could correct their decision, as long as it is within a reasonable time. In the Scheme for Construction Contracts (as amended), such clerical or typographical corrections should be made within five days of the decision.

This is intended for minor corrections such as typographical errors, accidental omissions, or errors in calculations; the slip rule has been the subject of various Court proceedings.

The below list briefly summarises the various decisions from notable cases, with reference to the application and limitations of the slip rule.