At least 1 metre of freeboard is required. Freeboard is the height from the top of the water. level (i.e. spillway level) to the top of the wall. 11. Stockpiled topsoil should be spread over. the dam wall and spillway and seeded immediately. with grasses to promote stabilising vegetation.
In Express Checkout, authorizing and processing a payment requires: 1  Setting up the payment authorization. 2  Redirecting the customer to PayPal. 3  Obtaining the customer details.  Confirming the payment 1  authorization. Capturing the payment (future).
Many API calls require a set of values to authenticate you as the owner of a PayPal account. The NVP/SOAP API credentials are assigned to your PayPal account and consist of an API Username, an API Password, and a Signature. Some API calls (such as those in the Adaptive APIs) also require an AppID value.