The answer to the above question is option 1: "Changes in ecological character have occurred, are occurring or are likely to occur in the wetland as a result of human interference."

This statement describes the condition that needs to be met for a wetland to be added to the Montreux Record. The other options are not related to the Montreux Record but rather to other aspects of wetland conservation.

Option 2 suggests the enactment of a law to prohibit human activity near the wetland, which may be a useful conservation measure but is not directly related to the Montreux Record.

Option 3 emphasizes the importance of cultural diversity and its preservation but does not relate to the Montreux Record`s objectives.

Option 4 refers to the designation of a wetland as a World Heritage Site, which is a separate process and does not necessarily indicate that the wetland is facing threats or changes in ecological character.