Swedish to English Social Sciences Government / Politics

Please note, I don't understand Swedish; my text is in French, but is discussing Swedish government.

Here's my translation of my French sentence to English:

The same decree [2007:515] envisages the presence of members of parliament [or perhaps simply "delegates" or "representatives" - the Swedish legislation uses "regeringen"] on the advisory boards [insynsråd in Swedish legislation], and in administrative authorities that are neither single-person nor collegial authorities, as is the case of the county administrative boards [länstyrelse], a member of parliament may be chair or vice-chair of the advisory board [insynsråd].

Now, the "single-person nor collegial" sounded strange to me, so I looked up the Swedish text being cited.

The article cited starts with "Särskilda bestämmelser för styrelsemyndigheter".

(Article 10 in http://www.riksdagen.se/sv/Dokument-Lagar/Lagar/Svenskforfat...

According to Google Translate, "Särskilda bestämmelser för" means "Special provisions for". Now, there are two other "special provisions for" headings elsewhere in the text:

Särskilda bestämmelser för nämndmyndigheter
Särskilda bestämmelser för enrådighetsmyndigheter

So, I was confused at first, as it didn't look like there was anything remotely similar to "neither single-person nor collegial" in the article being cited. But, it looks like the author is defining the "styrelsemyndigheter" as meaning "neither nämndmyndigheter nor enrådighetsmyndigheter". Is this necessary? Is there not a more direct translation of "styrelsemyndigheter"? Google Translate uses the same translation for both styrelsemyndigheter and nämndmyndigheter, so perhaps it's tricky to provide an exact translation. If you had to translate "administrative authorities that have a styrelsemyndigheter", how would you translate it?