What are the changes to payments at gas stations in Uruguay?

In order to prevent robberies of cash at gas stations in Uruguay there are some new rules.  Here are the details:

• From May 15 you can not pay for gas or purchases in convenience stores attached to gas station during the night. This applies first for gas stations in Montevideo and Canelones.
• From July 1 the above rule will be extended to all day.
• From July 1 the above rule will also take effect for night time purchases, for the rest of the interior departments.
• From August 15 throughout the country, you MUST pay for all fuel and purchases with debit or credit card.

Here is the full article.