3.—(1) Part 1 of Schedule 1 to the Principal Regulations (list of prescribed diseases and the occupations for which they are prescribed)(1) is amended as follows.
(2) In column 1—
(a)for A1 substitute—
“A1 Leukaemia (other than chronic lymphocytic leukaemia) or primary cancer of the bone, bladder, breast, colon, liver, lung, ovary, stomach, testis or thyroid.”;
(b)in B6 omit the words “(including farmer’s lung)”;
(c)after C33 insert—
“C34 Extrinsic allergic alveolitis.”;
(d)in D9 omit the words “with obliteration of the costophrenic angle”.
(3) In column 2—
(a)for A1 substitute—
“Exposure to ionising radiation where the dose is sufficient to double the risk of the occurrence of the condition.”;
(b)in B6, after the words “heterologous proteins” insert “or any other biological substance that causes extrinsic allergic alveolitis” and at the end insert “; or (f) any other workplace”;
(c)after C33 insert—
“Exposure to airborne isocyanates; or to any other chemical substance that causes extrinsic allergic alveolitis.”.