Mandatory field depending on the use of words in the description

Summary:

Building an expression in a Page Composer

Content (required):

The goal is to make dff mandatory if there are no words 'SR' or 'торги' in the Requisition Description. How can we do it? tried to use an expression #{bindings.Description.inputValue.contains('SR') or bindings.Description.inputValue.contains('торги') ? false : true} , but the form broke.

Please tell me how to implement it

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

23А

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