There are considerable deficits in the cross-border fight against crime, in collaboration in judicial matters and in the unification of law.

Then he began to serve as a member of the legal commission to the Lebanese cabinet and legal commission for the modernization and unification of laws at the ministry of justice.

In 1927-28 CITEJA studied and developed the proposed draft convention and developed it into the present package of unification of law and presented it at Warsaw Conference which was approved between 4 and 12 October 1929.

With the unification of laws and centralization of state power (e.g. the Municipal Police Act of 1844 in New York City, United States), such formations became increasingly incorporated into state-run police force (see metropolitan police and municipal police).