Entitlement for extension of time

• If the procedures which the contract las down are strictly followed . 
• Can only be validly granted in respect of an event that is expressly included in the contract as a 'relevant event  and which has delayed , or is likely to delay completion . 
• The delay must be one affecting an activity / activities that are on the critical path . ie. One that is having 'little or no float ' that cannot be delayed without affecting the others.