Terms & Conditions Template from cambridgeenglish

Here's a sample clause that cambridgeenglish uses:

1.5 You acknowledge that we cannot guarantee that our Site will always be available to you, owing to the nature of the internet. In addition, you acknowledge that our Site may be unavailable owing to maintenance, but where possible we will carry out such maintenance outside core operating hours, and we will try to minimise the period of any disruption.