) ▁and ▁the ▁non - dis closure ▁agreement ▁( ND A ) ▁-- ▁const itute ▁one ▁of ▁three ▁restrict ive ▁c oven ants ▁frequently ▁found ▁within ▁a ▁business ▁contract . ▁They ▁may ▁be ▁entered ▁into ▁with ▁both ▁employees ▁and ▁independent ▁contract ors ▁-- ▁in ▁addition ▁to ▁multiple ▁entities ▁-- ▁as ▁part ▁of ▁a ▁larger ▁general ▁contract ▁or ▁as ▁a ▁stand alone ▁provision . ▁ ▁Rest rict ions ▁ ▁Non - Sol ic itation ▁Ag re ements ▁are ▁restricted ▁by ▁convention , ▁juris diction , ▁and ▁terms ▁of ▁scope . ▁Furthermore , ▁en force ability ▁has ▁proven ▁difficult ▁and , ▁in ▁certain ▁instances , ▁has ▁been ▁de emed ▁" very ▁subject ive ." ▁ ▁Rest raint ▁of ▁Trade ▁ ▁A ▁Non - Sol ic itation ▁Ag re ement ▁that ▁is ▁too ▁widely ▁constru ed ▁may ▁viol ate ▁standards ▁of ▁" reason ab len ess " ▁( dec ided ▁on ▁a ▁case - by - case ▁basis ). ▁Under ▁common ▁law , ▁an ▁over re aching ▁agreement ▁would ▁be ▁de emed ▁a ▁rest raint ▁of ▁trade ▁and ▁thus ▁be ▁de emed ▁invalid . ▁ ▁Jur is diction ▁ ▁Non - Sol ic itation ▁Ag re ements ▁are ▁restricted ▁in ▁certain ▁juris dict ions , ▁not ably ▁California , ▁which ▁prohib its ▁such ▁agre ements ▁for ▁all ▁circumstances ▁other ▁than ▁the ▁protection ▁of ▁company ▁trade ▁secre ts ▁in ▁all ▁but ▁several ▁exceptions , ▁a ▁decision ▁u ph eld ▁by ▁the ▁State ▁Supreme ▁Court ▁in ▁ 2 0 0 8 . ▁ ▁In ▁Canada , ▁Non -