Complex sentence: A rationalisation plan to amalgamate the existing six Reserve Regiments to three, and to abolish one third of Reserve personnel posts has been mooted for some years, was agreed by the New Zealand government in August 2011, and is being implemented in 2012.
Split into simpler sentences: A rationalisation plan to amalgamate the then existing six Reserve Regiments to three, and to abolish one third of Reserve personnel posts, had been mooted for some years. This was finally agreed by the New Zealand government in August 2011, and was implemented in 2012.