Delhi Labour Minister Gopal Rai on Monday said that workers should not be employed on a contract basis for jobs which are permanent in nature like cleaning, security and clerical work.Rai said that the Delhi Advisory Contract Labour Board was formed last month to address problems faced by contractual employees and its first meeting will be held on December 20.The board, headed by Rai, will have representatives from all major workers' unions, employers, two legislators and representatives from the government.Rai said that the two main agendas of the Board will be similar pay for similar jobs and not hiring workers on a contract basis for jobs that are permanent in nature.The Minister said that the board will identify all such jobs and develop a new system and also take the opinion of others who work on the issue.