UN to investigate chemical weapons accusations in Syria, when "practically possible"

“The United Nations will investigate accusations that chemical weapons were used earlier this week in Aleppo Province in northern Syria, Secretary General Ban Ki-moon announced on Thursday. Mr. Ban said the investigation would begin “as soon as practically possible,”” And when will it “practically” be possible? Next year, for example?

This directly reminded me of paragraph 11 of UNGA Resolution 194 - adopted on 11 December 1948 - which states: “Resolves that the
 refugees wishing to return to their homes and live at peace with their neighbours should be permitted to do so at the earliest 
practicable date…” Have they returned home, yet?