HONOLULU (AP) — For decades, tourists to Hawaii have brought home gift boxes of the islands’ famous chocolate-covered macadamia nuts for friends and family, but these days many of the kernels in the package might not be Hawaii-grown.

This little-known fact is surfacing at the state Legislature as lawmakers wrestle over legislation that would force macadamia-nut processors of iconic brands like Mauna Loa to disclose whether their products contain nuts from outside the islands.

Growers want the measure to protect their crops and farms, while commercial nut brands say what Hawaii needs is more capacity to process mac nuts locally.

It’s the latest tussle over labels for agricultural products from a specific geographic area, a topic familiar to Hawaii due to long-running disputes over Kona coffee. It echoes similar challenges faced by maple syrup producers in Vermont and distilleries in Champagne, which have had to fend off sparkling wine producers from other places trying to appropriate the French region’s name.