Explanation:

ZilaParishad

Zila Parishad or District Council is the third tier in the Panchayati Raj system added to the Constitution by 73rd Constitutional Amendment Act of 1992. 
It is an elected body and it's members shall be elected directly by the people. The chairperson and vice chairman is to be elected indirectly by and from amongst the elected members.
The members of the Panchayat Samiti (link between gram panchayat and zila parishad)  are ex officio members of the Zila Parishad.
The Deputy Chief Executive Officer from General Administration department at district level is ex-Officio Secretary of Zila Parishad.
he Chief Executive Officer, who is an IAS Officer or Senior State Service Officer heads the administrative set up of the Zila Parishad.
The member of State legislature  and Parliament are also members of Zila Parishad.
One thirds of the total seats are reserved for women and reservation of seats for scheduled caste and scheduled tribe according to the proportion of their population.