Doing otherwise could result in the customer walking away.
Failure to follow these directions could result in losing customers.
Also within the sprawling grounds of the park are the official residence of the president of the Republic, which dates from 1751 (guided tours from the Visitor Centre Saturday at 9:40am and 4:20pm), and the US ambassador's residence, an 18th-century house which was formerly the official residence of the Viceroy's chief secretary (not open to the public).