A 52-year-old man with no known cardiovascular disease attends for a Heart Health Check. He is a non-smoker with BMI 27 kg/m². Blood pressure averages 138/84 mmHg, total cholesterol 5.6 mmol/L, HDL 1.1 mmol/L. He is not Aboriginal or Torres Strait Islander. According to the 2023 Australian CVD risk guideline, in which age group should absolute CVD risk assessment routinely commence in people like him without known CVD?