| hasMinLength | Validates that a field meets the minimum length requirement |
| hasSelections | Validates array has at least one selection and no duplicates |
| isAlphaOnly | Validates that a field contains only alphabetic characters (including accented characters) |
| isInRange | Validates numeric value is within range |
| isRequired | Validates that a field contains a non-empty value |
| isValidDate | Validates that a date string matches the specified format and represents a valid date |
| isValidEmail | Validates email format |
| isWithinAgeRange | Validates that a birth date results in an age within the specified range |
| validateAge | Validates a numeric age value |
| validateDate | Validates a date field with age restrictions |
| validateName | Validates a name field with standard requirements |
| validateParentEmail | Validates parent email (conditional based on age) |