Which step is required to create and reference a new SecondaryAddressesLV PCF file?

To create and reference a new SecondaryAddressesLV PCF file, adding a toolbar for pagination is a necessary step. In the context of Guidewire PCF files, using a toolbar provides users with controls to navigate through a list of addresses that could be potentially long. Pagination is critical in enhancing user experience and maintaining performance, as it limits the number of records rendered at one time.

When you create a SecondaryAddressesLV PCF file, typically, it will represent a list of secondary addresses, which can grow over time as users add more. Without a toolbar, managing numerous entries could become unwieldy and inefficient. Therefore, having a toolbar not only facilitates better navigation but also helps meet user interface design standards within Guidewire's ecosystem.

The other options, while potentially useful in various contexts, do not directly contribute to the fundamental creation and referencing of a new PCF file. For instance, implementing new style guidelines, validating addresses, or connecting to external APIs could be part of broader application functionality, but they do not address the immediate needs of organizing and displaying the address data through a PCF. Thus, adding a toolbar is the most relevant step in this scenario.