A C182 PLT TOOK OFF VFR WITH THE INTENTION OF PICKING UP HIS IFR CLRNC IN THE AIR WHEN FLT WAS RESTRICTED BY NOTAM.

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I HAD FILED AN IFR FLT PLAN FOR HOUSTON CLOVER FIELD (LUS) TO WACO REGIONAL(ACT) WITH THE FLT SERVICE STATION. I HAD RECEIVED A STANDARD BRIEFING; AND I WAS TOLD THERE WERE NO NOTAMS FOR THE DEP OR ARRIVAL. I TOOK OFF OUT OF CLOVER AND I CALLED HOUSTON APCH ON FREQ. I RECEIVED A XPONDER CODE AND I WAS TOLD TO SWITCH TO FREQ. WHEN I ASKED THE CTLR FOR MY IFR CLRNC TO WACO; HE TOLD ME I HAD TO LAND IMMEDIATELY AND RE-FILE MY FLT PLAN. I LANDED AT HOUSTON SW AND RE-FILED AND CALLED CLRNC DELIVERY AND THEN I CONTINUED MY FLT WITHOUT ANY OTHER PROBS. I WAS NOT AWARE THAT I HAD TO CALL CLRNC. DELIVERY FOR MY IFR CLRNC. I HAVE MADE THIS SAME TRIP MANY TIMES IN THE PAST; AND I HAD ALWAYS RECEIVED MY CLRNC ONCE AIRBORNE FROM CLOVER. I ALSO BELIEVE THE PRE-FLT BRIEFER SHOULD HAVE TOLD ME THAT I HAD TO GET A CLRNC ON THE GND. AS PIC; I WAS RESPONSIBLE FOR THE LOCAL NOTAM; BUT I HAD FIGURED THAT IF THE BRIEFER DIDN'T TELL ME ABOUT THE NOTAM; THEN THE AIRSPACE RESTR HAD BEEN RESOLVED. SAFETY WAS MY CHIEF CONCERN AND IT WAS NEVER COMPROMISED.