I have been reading the standard BS EN ISO 15614-1: 2017 and i appear to have reached an end pass could any one please explain whether or not the two insertions below out of the standard contradict each other 8.4.3 type of joint/weld  

a) butt welds qualify full and partial penetration butt welds and fillet welds, while fillet weld tests are required where T-joints are performed by fillet welds or partial penetration butt welds in the predominant form of welded connections in relation to the design and production welding;

b) full penetration butt welds qualify full and partial penetration butt welds and fillet welds in any type of joints;

Thank you.