Where there is more than one reinsurer sharing a line of insurance on a risk in excess of a specified retention, each such reinsurer shall contribute towards any excess loss in proportion to his original participation in such risk.
Example
Retention $100,000, Reinsurer A accepts one-half contributing share part of $1,000,000 in excess of said $100,000. Reinsurer B accepts remaining one-half contribution share part of $1,000,000.