Automated "freeze" for CA objects

A customer is asking, if there is a way to automate the "freeze" process for CA objects. Today all objects in "Proposed Changes" need to be set to "freeze", before the workflow of the CA can be changed to "In Approval". Can this operation be automated e.g. by establishing a BL or by editing an existing BL for CA?

As alternative > can a BL be established or maybe an existing BL for CA be modified that also objects "in work" can be released by a CA without setting to "freeze"?