"Nananawagan ako sa Presidente na i-revoke ang clearance na 'yan," Lorenzo "Larry" Gadon, legal counsel of the VACC, said in a forum in Quezon City.
Gadon was referring to the allow departure order (ADO) issued by the Department of Justice to De Lima.
VACC chairman Dante Jimenez said in the same forum that De Lima should stay in the country to answer to the charges that they filed against her.
The VACC filed a drug trafficking complaint against De Lima before the Department of Justice over her alleged involvement in the illegal drug trade at the New Bilibid Prison.
The group had also filed a disbarment case against De Lima before the Supreme Court over the senator's alleged illicit affair with her former driver-bodyguard Ronnie Dayan.
Two more disbarment cases have been filed against De Lima by lawyers Agustin Sundiam and Ricardo Rivera.
Gadon said they have learned that De Lima is leaving on Sunday night.
"It's too late. Nalaman namin na she's leaving tomorrow evening, it's Sunday, Wala na kaming magagawa," said Gadon.
De Lima will be out of the country from December 11 to 22.
Gadon said the only legal recourse they have at the moment is to ask the president to revoke the travel clearance as he has the authority to do so.