"The Activity Classification for the Time Use Survey (ACTUS) was developed to assist in the study of time use in the New Zealand context. This classification was designed to meet the requirements of the Statistics New Zealand Time Use Survey 2009/10. ACTUS is based on the activity classification used for the Statistics New Zealand Time Use Survey 1998/99. Changes to this classification have been made to reflect the needs of users and to improve international comparability with time use surveys in Australia, Canada, the United States of America, and the United Kingdom. ACTUS is a hierarchical classification of four levels. Level one of the classification has four categories. Level two has 11 categories, level three has 71 categories, and level four has 126 categories – excluding residual categories."