Attribute to indicate that the certificate holder may sign in the name of a third person.

ISIS-MTT PROFILE: The corresponding ProcurationSyntax contains either the name of the person who is represented (subcomponent thirdPerson) or a reference to his/her base certificate (in the component signingFor, subcomponent certRef), furthermore the optional components country and typeSubstitution to indicate the country whose laws apply, and respectively the type of procuration (e.g. manager, procuration, custody).

ISIS-MTT PROFILE: The GeneralName MUST be of type directoryName and MAY only contain: - RFC3039 attributes, except pseudonym (countryName, commonName, surname, givenName, serialNumber, organizationName, organizationalUnitName, stateOrProvincename, localityName, postalAddress) and - SubjectDirectoryName attributes (title, dateOfBirth, placeOfBirth, gender, countryOfCitizenship, countryOfResidence and NameAtBirth).

              ProcurationSyntax ::= SEQUENCE {
                country [1] EXPLICIT PrintableString(SIZE(2)) OPTIONAL,
                typeOfSubstitution [2] EXPLICIT DirectoryString (SIZE(1..128)) OPTIONAL,
                signingFor [3] EXPLICIT SigningFor 
              }

              SigningFor ::= CHOICE 
              { 
                thirdPerson GeneralName,
                certRef IssuerSerial 
              }

              ProcurationSyntax ::= SEQUENCE {
                country [1] EXPLICIT PrintableString(SIZE(2)) OPTIONAL,
                typeOfSubstitution [2] EXPLICIT DirectoryString (SIZE(1..128)) OPTIONAL,
                signingFor [3] EXPLICIT SigningFor
              }

              SigningFor ::= CHOICE
              {
                thirdPerson GeneralName,
                certRef IssuerSerial
              }

              ProcurationSyntax ::= SEQUENCE {
                country [1] EXPLICIT PrintableString(SIZE(2)) OPTIONAL,
                typeOfSubstitution [2] EXPLICIT DirectoryString (SIZE(1..128)) OPTIONAL,
                signingFor [3] EXPLICIT SigningFor
              }

              SigningFor ::= CHOICE
              {
                thirdPerson GeneralName,
                certRef IssuerSerial
              }