Complex sentence: The Office of the Chief Trade Adviser (OCTA) is being established to provide the Forum Island Countries with independent advice and support in the Pacific Agreement on Closer Economic Relations (PACER) Plus trade negotiations with Australia and New Zealand.
Split into simpler sentences: The Office of the Chief Trade Adviser (OCTA) is an independent trade advisory body of the Forum Island Countries. OCTA provides independent advice and support to the Forum Island Countries in the Pacific Agreement on Closer Economic Relations (PACER) Plus trade negotiations with Australia and New Zealand.