The Planning and Development (Amendment) Act 2010 introduced new legislative requirements and regulations for quarries. These changes were introduced because the European Courts of Justice held that Ireland was in breach of EU law, in allowing the retention of planning permission for projects where an Environmental Impact Statement was required. The ruling has resulted in an obligation on all Planning Authorities to review every quarry in its administrative boundary, to regularise their planning status, or – where quarries are deemed to be unauthorised – to take appropriate enforcement action. The new legislation may have serious and far-reaching consequences for quarries that are currently operating or those that are temporarily dormant. To ensure that quarrying activities can continue, or recommence, without the risk of enforcement or other action being taken, it is vital that all quarry owners engage fully with the current planning regularisation process.