The binding legal principle established is that for purposes of determining whether an Environmental Authorisation has lapsed under a condition requiring commencement within a specified period, 'commencement' includes any physical activity on site that can be viewed as associated with the authorised activity or in furtherance of it, including site preparation activities such as demarcation, clearing vegetation, and ground levelling. The definition of 'commence' in section 24 of NEMA, which includes 'the start of any physical implementation in furtherance of listed activity, including site preparation', must be given a purposive and inclusive interpretation. Where an authorised activity comprises multiple components (such as a filling station with retail area, parking bays, and fuel tanks), any physical activity associated with any of these components constitutes commencement of the activity as a whole. Environmental Authorisations must be interpreted in the context of the integrated environmental management framework under NEMA, having regard to the language used, the context, the apparent purpose, and the background known to those responsible for its production, in accordance with the principles in Natal Joint Municipal Pension Fund v Endumeni Municipality 2012 (4) SA 593 (SCA).