Section 5(3)(ii) in The Punjab School Education Board Employees (Punishment and Appeal) Regulations, 1978
(ii)The seniority on repromotion of an employee reduced to a lower post on time-scale should be determined by the date of such repromotion in accordance with the orders issued by competent authority on the subject of seniority. Such an employee should not be restored to his original position unless this is specifically laid down at the time the order of punishment is passed or revised on appeal