ExportNZ supported a recent Productivity Commission recommendation that an automatic exemption from the Commerce Act for conference agreements between shipping lines should be abolished, Beard said.
"We accept that the shipping lines need to work co-operatively on non-rate making agreements in order to facilitate reliable provision of container services, but we would like to see more transparency and scrutiny over agreements around the setting of rates."
Global shipping operator Maersk Line told its New Zealand customers this month about its price increase, which will apply from January 1.
"We appreciate the significance of this increase," it said.
"We hope that you in turn will appreciate the necessity for us to continue to invest in the growth and development of the reefer [refrigerated container] trade and the benefits this investment generates," Maersk said in its advisory notice to NZ customers.
The company said the current refrigerated container rates were too low to support the investment in equipment, as well as research and development, required to give its clients the best products and services.