Dukkha is usually clarified as an intrinsic characteristic of everything conditioned and to be as such a direct derivative of the characteristic of impermanence. Does this also apply to the noble path(s)? There is a discussion about that in the kathāvatthu (17.5), but that could not clarify it (at least for me).
(I'm also bearing in mind, that the paths are classified as being anāsava. Would that imply that an anāsava-dhamma is not impermanent, suffering, not-self?)
P.S. In the cūḷavedallasutta, MN 44, it is stated explicitly that the noble eightfold path is conditioned:
[...] “Ariyo panāyye, aṭṭhaṅgiko maggo saṅkhato udāhu asaṅkhato”ti?
“Ariyo kho, āvuso visākha, aṭṭhaṅgiko maggo saṅkhato”ti. [...]
[...] “But is the eightfold Noble Path, Noble Lady, conditioned or unconditioned?” “The eightfold Noble Path, friend Visākha, is conditioned.” [...]