At least seven Lok Sabha members, including actor-turned-politician Jaya Prada (Samajwadi Party), have been issued an ultimatum by Speaker Somnath Chatterjee to submit a declaration of their assets and liabilities by May 16.

Chatterjee threatened to refer their names to the Privileges Committee for necessary action if the declaration was not furnished, sources in the Speaker's Secretariat said in New Delhi on Wednesday.

The other members to whom the ultimatum has been issued are -- Akshay Pratap Singh Gopalji and Rasheed Masood (SP), Vijay Krishna (Rashtriya Janata Dal), Bhavna Pundikrao Gawli (Shiv Sena), Rattan Singh Ajnala (Shiromani Akali Dal) and L Ganesan (Marumalarchi Dravida Munnetra Kazhagam).

As per the 'Members of Lok Sabha (Declaration of Assets and Liabilities) Rules', all new members of the lower House are supposed to furnish the details to the Speaker within 90 days from the date on which he or she makes and subscribes to an oath of affirmation for taking the seat.

A register is maintained by the Lok Sabha secretary general that is kept confidential.