Can we write validation Rules using EL expression on a date field in Page Composer.

Use Case: User should be restricted from selecting date prior to SYSDATE - 2

Questions:

1. Can we add this validation on a date field using Page Composer?
2. What is the EL expression to fetch current date? Below expressions does not return any value.

#{dateTime.now}
#{oracle.jbo.domain.Date.currentDate}
#{adf.currentDate}
#{generalSettings.formattedCurrentDate}