Dear student,
There is not such separate term as political organisation. A party itself is an organisation. The following is the criteris for a party to become a national level organisation:
1. If a party is recognised as a state party in 4 or more states.
2. If a party has secured more than 2% of seats in Lok Sabha from 3 or more states.
3. It secures 6% of votes in 4 or more states in Lok Sabha and overall 4 seats.