Thailand has a policy of uniform tariffs which involves cross-subsidization. This requires EGAT to sell electricity at a lower tariff to PEA as compared to Metropolitan Electricity Authority (MEA), irrespective of whether the cost of supply to PEA is higher than that of MEA. This implies that customers in the metropolitan areas basically subsidize the tariff of the provincial customers, and large users subsidize the smaller consumers. EGAT sells power to MEA and PEA at Bulk Supply Tariff (BST), the price of which depends upon the voltage, time of the day and day of the week. [2] Currently the average electricity sales price by EGAT under their BST structure is shown in Table 2 below: