As per the AARPN constitution (https://aarpn.com/index.php/aarpn_constitution/) and website definitions:

Nutrition Practice is the evidence-informed provision of Dietary Services through the use of Personalised/Precision Nutrition interventions based on clinical insight, derived from case-history, dietary recalls, functional and pathology testing, genetic testing [such as, single nucleotide polymorphism (SNP) tests, whole exome and genome sequencing]), and from this insight, a Practicing Nutritionist may utilise: 

(1) the prescription of orally administered, food-based-dietary-supplements and Therapeutic Goods Authority of Australia (TGA) approved dietary supplements that are administered in an evidence-informed manner, based on the critical evaluation of existing scientific nutrition and/or dietary data, in conjunction with clinical expertise; 

(2) the provision of scientific evidence-informed dietary advice on dietary modification; and 

(3) the provision of scientific evidence-informed advice on levels of physical activity (which support nutritional related outcomes); 

all of which are implemented either independently or collectively in a personalised manner, or as a part of a wider public health activity or initiative in partnership with general and allied health practitioners, in the best interest of the client and/or community. Nutrition Practice does not include the use of liquid herbs. 

Personalised/Precision Nutrition means the targeted provision of Dietary Services through the application of Nutrition Practice by Practicing Nutritionists, for the purposes of optimising health including but not limited to supporting disease prevention, disease management, health remediation and recovery, and improving human performance, based on genetic, phenotypic, medical, nutritional, and other relevant information about individuals or groups of individuals, or populations. 

Dietary services include scientific evidence-informed dietary advice on intake of food in substances and in liquids, and the scientific evidence-informed prescription of orally administered dietary supplements to the diet of an individual or group of individuals, or population, as well as the provision of scientific evidence-informed advice on levels of physical activity (which support nutritional related outcomes), for the purposes of optimising health including but not limited to supporting disease prevention, supporting disease management, health remediation and recovery, and improving human performance. 

Dietary advice is the provision of evidence-informed guidance and recommendations on dietary intake of food in substances and in liquids to an individual or group of individuals, or population, and can include the provision of scientific evidence-informed advice on levels of physical activity (which support nutritional related outcomes) to an individual or group of individuals, or population, for the purposes of optimising health including but not limited to supporting disease prevention, supporting disease management, health remediation and recovery, and improving human performance.