A health insurance provider undertakes enhancements to its mobile application platform and finalizes the following capabilities as part of the scope of the next release:

1. Ability to integrate online maps and global positioning system (GPS) technology with the mobile application In real time to display location of service providers in the subscriber's vicinity that participate in the subscriber's plan network.

II. Ability for the subscriber to lookup the service providers by specifying either a postal code or a search area radius in miles.

III. Ability for the subscriber to initiate the download of fee information for one or more service providers in a single request.

Through requirements workshops the business analyst elicits the following detailed business requirements:

1. The company's mobile application platform must support real time integrate with the following third party systems:

1. GPS System

2. Postal Code Validation

What kind of relationship is used to describe the traceability between requirement 8 and the solutes artifacts that implement it?