INSTRUCTOR PLT OF AN SEL SMA PENETRATED CLASS B AIRSPACE DUE TO A MISUNDERSTANDING OF THE ATC PROCS FOR OBTAINING ACTUAL CLRNC INTO THE AIRSPACE. HE IMMEDIATELY DSNDED OUT OF THE AIRSPACE WHEN THE CTLR ADVISED THAT HE DID NOT HAVE CLRNC.

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I INADVERTENTLY ENTERED THE CLASS B AIRSPACE FOR DEN. I DID SO BASED ON MY INCORRECT ASSUMPTION THAT ONCE I WAS TALKING TO DEN APCH (ON 128.25) THEY WOULD AUTOMATICALLY CLR ME INTO THE AIRSPACE AS I APCHED IT. SINCE I WAS TALKING TO APCH PRIOR TO THE MODE C VEIL; AND WHILE FLYING UNDER A SECTION OF CLASS B AIRSPACE WITH A 10000 FT MSL FLOOR; I THOUGHT THE CTLR WOULD MONITOR MY APCH TO THE SECTION WITH AN 8000 FT FLOOR. WHEN I DID NOT RECEIVE A CLRNC; I ASKED THE CTLR TO CONFIRM MY CLRNC INTO CLASS B AIRSPACE AND HE RESPONDED 'NEGATIVE; DEPART CLASS B AIRSPACE IMMEDIATELY.' I THEN RAPIDLY DSNDED BELOW 8000 FT MSL AND CONTINUED MY FLT TO CENTENNIAL ARPT WITHOUT FURTHER INCIDENT. THE PREVIOUS EVENING I HAD SPECIFICALLY REVIEWED THE PROCS FOR ENTERING CLASS B AIRSPACE AS DESCRIBED IN THE AIM. WHILE THE AIM IS VERY CLR THAT CLRNC IS REQUIRED PRIOR TO ENTERING CLASS B AIRSPACE; THE SECOND SENTENCE OF PARAGRAPH 3-2-3;D;2;A CONFUSED ME. IT STATED '...COMS WITH ATC SHOULD BE ESTABLISHED IN RELATION TO THE POINTS INDICATED FOR SPACING AND SEQUENCING PURPOSES.' THIS LED ME TO BELIEVE THE CTLR WOULD MONITOR MY POS IN RELATION TO CLASS B AIRSPACE AND EITHER ADVISE ME THAT I WAS APCHING THE AIRSPACE OR AUTOMATICALLY CLR ME INTO IT. I MAY BE THE ONLY PERSON CONFUSED BY THIS STATEMENT; BUT IF NOT; I HAVE A SUGGESTION. I SUGGEST THE FOLLOWING SENTENCE BE ADDED TO THAT PARAGRAPH: 'CONTACT WITH ATC PRIOR TO PENETRATING THE MODE C VEIL; OR OPERATING BENEATH THE CLASS B AIRSPACE DOES NOT RELIEVE THE PLT OF THE RESPONSIBILITY TO REQUEST CLRNC INTO CLASS B AIRSPACE IF FLT INTO A PORTION OF THAT AIRSPACE IS ANTICIPATED.' I WILL BE MUCH MORE VIGILANT IN MY NEXT FLTS IN AND NEAR CLASS B AIRSPACE; AND I APPRECIATE YOUR CONSIDERATION OF MY SUGGESTION.