Forest functions of considerable local importance according to forest plans or an assessment by the local forest service. It's possible for there to be several forest functions of considerable local importance at the same time. Reference: Forest Service Survey (MID 327: Spezielle Waldfunktionen)

Code	Text	NFI3	NFI4	NFI4b	NFI5
-1	n/a	x	x	x	x
0	no special forest function	x	x	x	x
1	timber production	x	x	x	x
2	agricultural use	x	x	x	x
3	windbreak	x	x	x	x
4	drinking-water protection	x	x	x	x
5	protection against natural hazards		x	x	x
6	protection against natural hazards (SPF)	x
7	protection against natural hazards (non-SPF)	x
8	nature conservation	x	x	x	x
9	landscape protection	x	x	x	x
10	game protection	x	x	x	x
11	recreation	x	x	x	x
12	military	x	x	x	x
13	carbon sink				x