"Confidentiality and exceptions to it are explained and agreed upon."
"The duty for confidentiality"
"Confidentiality and exceptions to it are explained and agreed upon."
"confidentiality" 「守秘義務」
"and exceptions to it" 「とその例外」
"are explained" 「説明して」
"agreed upon" 「同意を得た」
"confidentiality" の代わりに "The duty for confidentiality" もつかえます。