The new rules, which went into effect Jan. 1, 2006 require that all wood packaging materials used for consignments to China be labeled with an approved manufacturer "IPPC" mark (in accordance with ISPM 15) and certified by the relevant quarantine authorities of exporting countries (Heat Treatment Certificate). However, China has made the change that it will not accept wood under the Methyl Bromide Fumigation Program though it is approved by the ISPM 15 Standard.
Any non-compliant wood packaging materials will be treated, destroyed or returned along with the consignments.
The new rules have been promulgated by China’s General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ), which is also supervising their implementation at Chinese ports.
Please see the following link for more details:
http://www.aphis.usda.gov/ppq/wpm/export/china.html