53It must be pointed out, however, that the obstacle concerned need not necessarily make the use of the trade mark impossible in order to be regarded as having a sufficiently direct relationship with the trade mark, since that may also be the case where it makes its use unreasonable. If an obstacle is such as to jeopardise seriously the appropriate use of the mark, its proprietor cannot reasonably be required to use it none the less. Thus, for example, the proprietor of a trade mark cannot reasonably be required to sell its goods in the sales outlets of its competitors. In such cases, it does not appear reasonable to require the proprietor of a trade mark to change its corporate strategy in order to make the use of that mark none the less possible.
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