Access: [6.3.1.2]: programmatic objects require testing (object)
(Priority 1)

Cause:

Verify content remain accessible when programmatic objects are disabled or not supported. If <object> is used to generate content, provide a text equivalent between the opening and closing object elements.

Testfile:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
	"http://www.w3.org/TR/REC-html40/loose.dtd">
<html lang="en">
<head>
<title>aert1.0/6.3.1</title>
</head>
<body>
<object></object>
</body>
</html>

References:

W3C WAI: http://www.w3.org/WAI//
HTML Techniques for WAI 1.0: http://www.w3.org/TR/WCAG10-HTML-TECHS/