请教CPP/EI Exemption是什么意思

angel0211

大家好，我才到加拿大上班，税务方面一头雾水。
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1 S- c/ J, \  ^) K( u0 X' b7 g1 g- l入职时小蜜给我一份CPT1表格填写。"Aplication to Canada Revenue Agency for CPP/EI Exemption". 请问这个表格是申请什么的？是申请不缴CPP/EI吗, 还是其他意思？
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表格里有这么一段话: ”XXX must make CPP and EI deductions from workers. However, if you interpret your income to be CPP/EI exempt, you must apply to CRA directly for a ruling on whether your employment is pensionable and/or insurable, or both”
" a3 v2 R& E& `“ruling”是什么意思啊？

4 f8 g3 |7 p% L( U/ \  f5 @/ h谢谢各位啦！