C750 FLT CREW OVERSHOT ALT RESTRICTION ON BYRON DEP; LVK. ALT RESTRICTION IS DISPLAYED ON THE PLAN VIEW; BUT NOT IN TEXT.

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DEPARTING LIVERMORE; CA; ON THE BYRON ONE SID. OUR IFR CLRNC ALT WAS TO CLB TO 4000 FT. IT WAS THE COPLT'S LEG (PF). I HAD BEEN BUSY LOADING PAX AND HAD LEFT THE COCKPIT SET-UP DUTIES TO THE COPLT. AFTER ENG START; PART OF HIS PRE-DEP BRIEF WAS 'CLB TO 4000.' THE DEP WAS RETRIEVED FROM THE DATABASE AND INSERTED INTO THE ACTIVE FLT PLAN PAGE. I HAD LOOKED AT BOTH SID'S EARLIER IN THE DAY AND NOT NOTICED ANYTHING UNUSUAL. UPON CLBING THROUGH 3000 FT A MESSAGE APPEARED ON THE FMS; 'CHK ALT CONSTRAINT.' I THEN NOTICED THE BOXED NOTE ON THE PLAN VIEW THAT SAID; OVER REIGA NDB; 'AT OR BELOW 3000 FT.' THIS WORDING ON THE PAPER COPY OF THE SID SHOULD BE CHANGED. IT IS NOT MENTIONED IN THE TEXTUAL DESCRIPTION. IN CONTRAST; ON THE LIVERMORE ONE DEP; THE ALT RESTR 'CLB RWY HDG TO 1200 FT' IS IN THE TEXT AND PLAN VIEW. ADDING TO THE CONFUSION UNDER THE TEXT (ON BOTH); IS ALT; 'MAINTAIN ASSIGNED ALT.' THE PROPER WORDING; IN BOTH THE PLAN AND TEXT; SHOULD BE THE SAME. THERE IS NO MENTION OF A CLB RESTR IN THE TEXT OF THE BYRON ONE AS THERE IS IN THE LIVERMORE ONE SID.