What does the phrase"impose duties" refer to?

Imposed duties are duties, the burden of which is imposed upon a person. They are those duties of a municipal corporation which are superadded to merely governmental functions, like the special private corporate duty to maintain streets in a safe condition for public travel, or the special, private corporate duty to maintain and manage corporate property so that city employees shall have safe places in which to work.

question is unclear.

i can't sorry.

post the full question so i can .