The ports of Los Angeles and Long Beach have again postponed charging a container dwell fee, this time until Jan. 28.

The fee, announced on Oct. 25, has yet to be charged to ocean carriers for imported cargo containers that sit too long on port docks, preventing workers from unloading waiting ships as quickly as they could otherwise.

Voluntary compliance has led to a 62% decline in older cargo on the docks of both ports, prompting both their directors to put off the fee.

Under the temporary program, approved Oct. 29 by both the LA and Long Beach harbor commissions, ocean carriers can be charged daily for each long-dwelling import container. The ports plan to charge ocean carriers $100 per container, increasing in $100 increments per day, until the container leaves the terminal.

Originally, the fee would begin for any container leaving via rail that remained at least six days and any truck-bound container that remained nine days or more. But the ports recently extended the program, initially set to run 90 days, for another threemonths and updated the rules to be nine days for all containers — no matter how they are scheduled to leave.

The ports, meanwhile, also are moving to charge similar fees for empty containers that sit too long at terminals, which need the space to process arriving ships.

That fee, also $100 per container per day, was set to go into effect Jan. 30 but stakeholders are still being consulted, said a Port of Los Angeles spokesman.