Max Effective Date for Each Element

Summary:

How to retrieve the max effective date for each Element.

Content (required):

I am trying to find the max effective date for each of the three Elements (different Savings Plans) so I can see the most recent effective date. Using the max function doesn't seem to work.

Any suggestions?

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):