Toblerone chocolate packaging will no longer feature Switzerland’s iconic Matterhorn mountain, as its U.S. owner Mondelez moves some production to Slovakia later this year.

The company will also remove a reference to Toblerone being “Swiss chocolate,” instead declaring it, “Established in Switzerland in 1908.”

It’s due to Swiss legislation, in force since 2017, which requires any product using “Swissness” to advertise a product or service to meet a set of origin criteria. Milk-based products must be made exclusively in the country.

Lawmakers say it is a way to protect the prestige associated with a Swiss-made product. Marks of “Swissness” can include the flag, references to cities such as Geneva, or in this case the famed mountain in the Alps known for its neat pyramid shape.

Mondelez confirmed it is changing its packaging due to Swiss legislation as it moves some production overseas.

It said the redesigned bar features a “modernised and streamlined mountain logo that is consistent with the geometric and triangular aesthetic,” and retains the subtle outline of a bear on the face of the mountain. Bern, the administrative capital of Switzerland, features a bear on its coat of arms.

Mondelez is also tweaking the Toblerone font and brand logo and including the signature of the distinctive nougat, almond and honey-filled chocolate’s founder, Theodor Tobler.

Mondelez said Toblerone bars would continue to be produced in Switzerland and that it had invested in its Bern factory to increase production of its 100g bars by 90 million a year.