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19 The expansion of an existing mine, mill, quarry or sand or gravel pit in one of the following circumstances:

(a) in the case of an existing coal mine, if the expansion would result in an increase in the area of mining operations of 50% or more and the total coal production capacity would be 5 000 t/day or more after the expansion;

(b) in the case of an existing diamond mine if the expansion would result in an increase in the area of mining operations of 50% or more and the total ore production capacity would be 5 000 t/day or more after the expansion;

(c) in the case of an existing metal mine, other than a rare earth element mine, placer mine or uranium mine, if the expansion would result in an increase in the area of mining operations of 50% or more and the total ore production capacity would be 5 000 t/day or more after the expansion;

(d) in the case of an existing metal mill, other than a uranium mill, if the expansion would result in an increase in the area of mining operations of 50% or more and the total ore input capacity would be 5 000 t/day or more after the expansion;

(e) in the case of an existing rare earth element mine if the expansion would result in an increase in the area of mining operations of 50% or more and the total ore production capacity would be 2 500 t/day or more after the expansion;

(f) in the case of an existing stone quarry or sand or gravel pit if the expansion would result in an increase in the area of mining operations of 50% or more and the total production capacity would be 3 500 000 t/year or more after the expansion.
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21 The expansion of an existing uranium mine, if the expansion would result in an increase in the area of mining operations of 50% or more and the total ore production capacity would be 2500 t/day or more after the expansion.
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23 The expansion of an existing uranium mill, if the expansion would result in an increase in the area of mining operations of 50% or more and the total ore input capacity would be 2 500 t/day or more after the expansion.
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25 The expansion of an existing oil sands mine, if the expansion would result in an increase in the area of mining operations of 50% or more and the total bitumen production capacity would be 10 000 m^{3}/day or more after the expansion.
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