Definition of maximally-specific superinterface methods

[Pietro Braione]

Hello to everyone. In the definition of maximally-specific superinterface methods of a class C it is said (section 5.4.3.3) that  "The method is declared in a superinterface (direct or indirect) of C”. Does this mean the superinterfaces of the superinterfaces… of the superinterfaces of C, or shall we also include the superinterfaces of the superinterfaces… of the superinterfaces of any superclass of C?
Pietro