(1)  If the package containing a pre-packed article is, in accordance with these regulations, marked "mass at standard condition" or with other words that have a similar meaning –

(a) the permissible actual deficiency is the deficiency specified in Column 2 of the Table to this regulation opposite the description of the class of article in Column 1 of that Table; and

(b) the permissible average deficiency is the deficiency specified in Column 3 of the Table to this regulation opposite the description of the class of article in Column 1 of that Table.

(2)  If the article consists of a mixture of any 2 or more of class A, B or C fibres (as described in Column 1 of the Table to this regulation) –

(a) the permissible actual deficiency is the deficiency, expressed as a percentage, calculated in accordance with the formula –

where –

x is the proportion that the mass of all class A fibre (if any) in the article bears to the total mass of the article; and

y is the proportion that the mass of all class B fibre (if any) in the article bears to the total mass of the article; and

(b) the permissible average deficiency is the deficiency, expressed as a percentage, calculated in accordance with the formula –

where –

x is the proportion that the mass of all class A fibre (if any) in the article bears to the total mass of the article; and

y is the proportion that the mass of all class B fibre (if any) in the article bears to the total mass of the article.

Table

Column 1	Column 2	Column 3
Class of article	Permissible actual deficiency (%)	Permissible average deficiency (%)
Class A fibre (wool or other animal fibre, viscose or cuprammonium rayon, or a mixture of any 2 or more of them)	11	6
Class B fibre (silk, cotton or cellulose acetate or a mixture of any 2 or more of them)	7	2
Class C fibre (a fibre, or a mixture of fibres, that is not a Class A or Class B fibre)	5	0