In certain cases of particularly complex mixtures, where assay of active substances which are very numerous or present in very low amounts would necessitate an intricate investigation difficult to carry out in respect of each production batch, the assay of one or more active substances in the finished product may be omitted, on the express condition that such assays are made at intermediate stages in the production process.
I gcásanna áirithe a bhaineann le meascáin atá an-choimpléasc, toisc go n-éileodh measúnú ar shubstaintí gníomhacha atá an-iomadúil nó nach bhfuil i láthair ach i méideanna bídeacha go ndéanfaí imscrúdú mionsaothraithe i ndáil le gach baisc tháirgthe, féadtar measúnú amháin nó níos mó ar shubstaintí gníomhacha sa táirge críochnaithe a fhágáil ar lár, ar an gcoinníoll sainráite go ndéanfar na measúnuithe sin ag idirchéimeanna den phróiseas táirgthe.