41. The next month, both marriages became legal because there was no estoppel in due time. 42. After the estoppel the expelled party members found a new party called the Hungarian Freedom Party. 43. Therefore, the Canadian courts emphatically reject what they refer to as " file wrapper estoppel ". 44. Nevertheless, the concepts of estoppel and equity have been employed in the adjudication of international disputes. 45. Further questions arise as to whether the legal doctrine of estoppel has any bearing on the situation. 46. In pursuit of that inquiry I do not find helpful the distinction between promissory and proprietary estoppel . 47. Lord Scott remarked that proprietary estoppel should be seen as a sub-species of promissory estoppel. 48. Lord Scott remarked that proprietary estoppel should be seen as a sub-species of promissory estoppel . 49. Extinguishment may also be effected through collateral estoppel following a final decision by a Court of Claims. 50. Under the doctrine of estoppel , a judge generally cannot consider an issue that has already been decided.
