The Associated Press was given a look at a memo distributed to the team on Wednesday that included a page of information concerning the trip to Mexico, including those two rules.
A section of the memo under the heading "safety" had a bullet point with: "DO NOT leave the hotel." It was followed by a line advising players to leave all "expensive jewelry at home," not to bring large sums of money and not to use ATMs.
A second section titled "health and performance" has basic tips like drinking only bottled water and avoiding the consumption of ice. It also warned: "Eat all meals in the meal room. DO NOT order room service" and "DO NOT eat outside of the team meal room."