PARACHUTE JUMPING POSSIBLE VIOLATION FAR 105. JUMPING THROUGH CLOUDS.

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DURING STEP DSCNT INTO CLEVELAND ON V525 AT 14000 FT MSL ADVISED BY ZOB (130.9) THAT A JUMP PLANE (SKY DIVERS) WAS 12:30 O'CLOCK; 6 MI AT 12000 FT MSL ABOUT 2 MINS FROM JUMPERS AWAY. TFC LATER PASSED 3 O'CLOCK; 2 1/2 MI ON TCASII (12000 FT MSL). OBSERVED SOLID CLOUD DECK BELOW. I QUESTIONED CTR ON WHETHER THE JUMPERS WERE GOING TO JUMP THROUGH THE CLOUDS. HE SAID HE COULDN'T ANSWER THAT. I ASKED ATC FOR THE FULL CALL SIGN OF THE JUMP PLANE. HE SAID HE HAD TO ASK SUPVR IF HE COULD GIVE OUT THAT INFO. AT FIRST JUMP PLANE USED CALL SIGN XYZ LATER XXXY. ATC NEVER DID GIVE CALL SIGN OUT. JUMP PLANE STATED THERE WAS A HOLE UNDER PLANE. WE LOOKED CLOSELY AND THERE WAS NONE THAT A PLANE COULD GO VFR 2000 FT HORIZLY FROM ANY CLOUD ETC. ALSO IT WAS AN AIRWAY. DSNDING INTO CLEVELAND TOPS WERE 6000 FT MSL BASE 4200 FT MSL. I DON'T THINK IT'S LEGAL TO JUMP THROUGH CLOUDS AND EVEN IF IT WAS; IT ISN'T SAFE. SOMEBODY COULD BE VFR 500 FT BELOW CLOUDS AND HIT A SKY DIVER AND EVERYBODY DIE. I DON'T THINK HE COULD LEGALLY GET VFR ON TOP AND THE CLOUD DECK EXTENDED AT LEAST 100 MI S AND MANY MI N. I THINK ATC SHOULD USE THE FULL CALL SIGN AND SURELY GIVE IT OUT WHEN ASKED.