German verbs : -ieren exceptions
An exception to the rule that past participles are formed by adding to the stem the prefix " ge-" and the suffix " -t" is the the large number of verbs of foreign origin fairly recently introduced into the German language and given the infinitive ending " -ieren".
These all form their past participle by simply changing the final " -en" to " -t" without adding a " ge-" prefix.
Der zitierte Satz. (adj)
Die organisierende Behorde. ( -ing, adj)