BRF+ Rule to write allowed list of characters for a field

Hello Experts,

How can I write a rule in BRF+ which allows only a given list of characters for a field?

For example,

Field is Name1

Allowed list of characters in Name1 are : a to z, 0 to 9, and some special characters & ' ( ) + , - . / : ; ? @

Here total number of character is 49.

When I use comparison operator "contains only" then it allows only up-to 40 characters in comparison parameter. So please guide me how to create this rule.

Thanks & Regards,

Swati Verma