| (1) | - | it must be unconditional; |
| (2) | - | it must be made at a proper time and place, and under such circumstances that the person to whom it is made may have a reasonable opportunity of ascertaining that the person by whom it is made is able and willing there and then to do the whole of what he is bound by his promise to do; |
| (3) | - | if the offer is an offer to deliver anything to the promisee, the promisee must have a reasonable opportunity of seeing that the thing offered is the thing which the promisor is bound by his promise to deliver. |