In this
schedule—

**"category" **see *section 2 **(1) **(b) *.

**"consecutive categories" **see *section 3 *.

**"corresponding score" **, for a category, means the score in *section 2 **(1) *,
table 1, column 2 that corresponds to the category.

**"reading" **, of a chest x-ray, see *section 2 *.

(1) A"reading", of a chest x-ray, is a process in which a qualified reader—(a) assesses the x-ray for the appearance of opacities; and(b) decides, in accordance with the ILO classification guidelines, the category in table 1, column 1 (the"category") that applies to the appearance of opacities in the x-ray; and(c) records the category decided underparagraph (b).## Table 1

Column 1

CategoryColumn 2

Score0/- 0 0/0 0 0/1 0 1/0 15 1/1 20 1/2 25 2/1 50 2/2 55 2/3 60 3/2 75 3/3 80 3/+ 85 Category A 90 Category B 95 Category C 100

(2) In this section—

"opacity"means—(a) a small opacity within the meaning of the ILO classification guidelines; or(b) a large opacity within the meaning of the ILO classification guidelines."qualified reader"means a doctor who is qualified and competent to categorise, in accordance with the ILO classification guidelines, the appearance of opacities in a chest x-ray.Example—a doctor approved as a B Reader by the National Institute for Occupational Safety and Health

Two categories are
**"consecutive categories" **if the categories—

(a) start with the same digit, other than 0; and

(b) appear in consecutive rows insection 2(1), table 1.

Examples of categories that are consecutive categories—• 2/1 and 2/2• 3/3 and 3/+

Examples of categories that are not consecutive categories—• 0/0 and 0/1• 1/2 and 2/1• category B and category C

(1) A worker’s pneumoconiosis score is worked out by using 2 readings of the same chest x-ray of the worker in the way provided undersubsection (2)or(3).

(2) If each reading records the same category, the worker’s pneumoconiosis score is the corresponding score for that category.

(3) If each reading records a different category, the worker’s pneumoconiosis score is—(a) if the 2 categories are any combination of 0/-, 0/0 or 0/1—0; or(b) if the 2 categories are consecutive categories—the higher of the corresponding scores for the consecutive categories; orExample for paragraph (b)—One reading records the category as 2/2, which has a corresponding score of 55. The other reading records the category as 2/3, which has a corresponding score of 60. The worker’s pneumoconiosis score is 60, being the higher of the corresponding scores for the consecutive categories.(c) if the 2 categories are any combination of category A, category B or category C—the higher of the corresponding scores for the 2 categories.Example for paragraph (c)—One reading records the category as category A, which has a corresponding score of 90. The other reading records the category as category C, which has a corresponding score of 100. The worker’s pneumoconiosis score is 100, being the higher of the corresponding scores for the 2 categories.

(1) This section applies if the worker’s pneumoconiosis score can not be worked out undersection 4.

(2) The worker’s pneumoconiosis score is worked out by—(a) obtaining a third reading of the same chest x-ray; and(b) using that reading, with the first 2 readings, in the way provided undersubsection (3)or(4).

(3) If the third reading records the same category as either of the first 2 readings, the worker’s pneumoconiosis score is the corresponding score for that category.

(4) If the third reading records a different category from both of the first 2 readings, the worker’s pneumoconiosis score is—(a) if 2 of the 3 categories are consecutive categories—the higher of the corresponding scores for the consecutive categories; orExample for paragraph (a)—The first 2 readings record the categories as 1/2 and 2/1. The third reading records the category as 2/2. Because the categories of 2/1 and 2/2 are consecutive categories, the worker’s pneumoconiosis score is 55, being the higher of the corresponding scores for the consecutive categories.(b) if 2 of the 3 categories are any combination of category A, category B or category C—the higher of the corresponding scores for the 2 categories.Example for paragraph (b)—The first 2 readings record the categories as 3/+ and category A. The third reading records the category as category B. The worker’s pneumoconiosis score is 95, being the higher of the corresponding scores for category A and category B.

(1) This section applies if the worker’s pneumoconiosis score can not be worked out undersection 4or5.

(2) The worker’s pneumoconiosis score is worked out by—(a) obtaining a fourth and fifth reading of the same chest x-ray; and(b) using those readings, with the other 3 readings, in the way provided undersubsection (3).

(3) The worker’s pneumoconiosis score is the corresponding score for the median category of the categories recorded in each of the 5 readings.Example—The first 3 readings record the categories as 1/2, 2/1 and 2/3. The fourth and fifth readings record the categories as 1/2 and 2/1. The 5 categories, in ascending order, are 1/2, 1/2, 2/1, 2/1 and 2/3. The median category is 2/1, and the worker’s pneumoconiosis score is 50.