A CGA LR25 WAS ISSUED A CLRNC TO CROSS 10 MI S OF ORF AT FL290 WITH CONFLICTING B727 TFC AT FL310. THE LR25 CROSSED ORF ABOVE THE ASSIGNED ALT RESULTING IN LTSS WITH THE ACR ACFT.

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LJ25 (CGA X) CHKED ON THE FREQ IN DSCNT TO FL330. WHEN CLR OF TFC ABOUT 50 MI S OF ORF; I GAVE CGA X A CLRNC TO CROSS 10 MI S OF ORF AT FL290. HE WAS OUT OF ABOUT FL340 AT THE TIME. CGA X READ BACK THE CLRNC. I HAD ACR Y N OF ORF AT FL310. THE CLRNC GAVE ME ROOM FOR THE RESTR TO WORK. CONFLICT ALERT ACTIVATED. CGA X WAS OUT OF FL317 ABOUT 15 MI S OF ORF; STILL ENOUGH TIME AND DISTANCE TO MAKE HIS RESTR. AT 10 MI S OF ORF; CGA X WAS OUT OF FL310. I ISSUED A TURN TO 110 DEGS AND CALLED TFC AND THEN GAVE ACR Y A TURN TO 270 DEGS. AT THIS TIME HE SAID HE HAD A TCASII RESOLUTION AND WAS CLBING. WHEN I HAD SEPARATION; I GAVE ACR Y BACK ON COURSE AND CGA X ON COURSE. CGA X MADE NO COMMENT. SUPPLEMENTAL INFO FROM ACN 412890: ON THIS SPECIFIC LEG (DIXON - NORFOLK) WE WERE IN A STEADY DSCNT FROM OUR CRUISING ALT OF FL430. ZDC PROCEEDED TO GIVE US A XING RESTR AS FOLLOWS; 'CROSS 10 MI S OF ORF AT AND MAINTAIN FL290.' AT THE TIME OF THAT CLRNC; WE WERE DSNDING THROUGH FL360. WITH A PROPER DSCNT; THAT XING RESTR SHOULD HAVE NOT BEEN A PROB TO MAINTAIN SINCE WE WERE STILL 4-5 MINS FROM THAT POINT (10 MI S OF ORF). NEVERTHELESS; I NOTICED THAT THE CURRENT RATE OF DSCNT WOULD NOT ALLOW COMPLIANCE WITH THAT ATC CLRNC. I PROCEEDED TO TELL THE CAPT THAT WE WERE NOT GOING TO MAKE THE ALT UNLESS WE INCREASED OUR RATE OF DSCNT CONSIDERABLY. BY THE TIME WE REACHED THE FORETOLD FIX WE WERE AT FL305 TO FL300. AT THAT POINT; AN AIRLINER; FLYING THE OPPOSITE DIRECTION ALONG J174; RPTED US AS A RESOLUTION ON HIS TCASII AND PROCEEDED TO TURN TOWARDS THE W TO COMPLY WITH HIS TCASII ALERT. WE HAD VISUAL ON THAT TFC. THE ESTIMATED DISTANCE TO THAT TFC WAS APPROX 3-4 NM. ATC INSTRUCTED US TO TURN TO HDG OF 090 DEGS. AFTER PROPER SPACING HAD BEEN REACHED; ATC RE- ESTABLISHED US ALONG OUR FLT PLANNED RTE. I BELIEVE THAT THIS INCIDENT COULD HAVE BEEN AVOIDED; WOULD THE CAPT HAVE PAID MORE ATTN TO THE TASK AT HAND. THE 2 CALLOUTS ON MY PART POINTING DIRECTLY TO THE PROB SHOULD HAVE BEEN ENOUGH TO RESULT IN PROPER ACTIONS OF THE PF. IN MY BELIEF; THE CAPT WAS PRIMARILY CONCERNED WITH GIVING A SMOOTH RIDE TO THE PAX ABOARD RATHER THAN MEETING THE RESTR. I ALSO BELIEVE THAT A CONVERSATION BTWN THE CAPT AND THE PAX DISTR HIM FROM ESTABLISHING A PROPER RATE OF DSCNT SHORTLY AFTER THE CLRNC WAS ISSUED.