What are typical rules for parallel academic appointments? Many universities have visiting (also sometimes termed adjunct outside the US) faculty positions for non-salaried academics associated with a department. My question concerns the cases where faculty members, rather than an adjunct appointment, hold parallel appointments at two different universities, perhaps as a part-time appointment.  What types of rules are there regarding e.g. attendance, affiliation in publications, teaching, PhD supervision, committee membership, access to funding, lecturing responsibilities, and salary for such cases? I'd appreciate pointers to corresponding policies or regulations.
What types of rules are there regarding e.g. attendance, 


Contractual: Attendance requirements are defined by employment contracts.


  affiliation in publications, 


List both, since you are employed by both. Perhaps order affiliations by who paid for the work, or include an acknowledgement to the institute that funded the research.


  teaching, 


Contractual


  PhD supervision, 


Your institutes will likely have expectations, either explicit or implicit. You'll have your own expectations.


  committee membership, 


Likely institutional expectations, e.g., you must serve on at least one committee. 


  access to funding, 


Apply using the most favourable institution


  lecturing responsibilities,


I don't understand this point.


  and salary 


You can negotiate with each institute.


  I'd appreciate pointers to corresponding policies or regulations.


Institution specific.