A senior Home Ministry official said since Delhi is a Union Territory, any bill it wants to adopt in the assembly has to be first sent to the central government for approval.
If the nod is given, then only it can be moved for legislative approval.
When the assembly passes the bill, then it has to go to the Lieutenant Governor and again to the central government for Presidential assent.
Since proper procedures were not followed, all the 14 bills were returned to the Delhi government for correction, the official said.
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This came weeks after President Pranab Mukherjee refused assent to a legislation that sought to protect 21 Aam Aadmi Party MLAs, who have been appointed Parliamentary Secretaries, from disqualification for honding office of profit.
The bills which were returned in the last few weeks include the Janlokpal Bill 2015, the Minimum Wages (Delhi Amendment) Bill 2015, Delhi School (Verification Of Accounts and Refund of Excess Fee) Bill 2015, Delhi School Education (Amendment) Bill 2015, Right of Children to Free and Compulsory Education (Delhi Amendment) Bill 2015 and a Bill related to working journalists.