Necessary conditions for convergence of a product?

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In the text "Function Theory of a Complex Variable" the definition and conditions for convergence for an Infinite product is given in $(1.)$ i'm initially having trouble discerning whether both conditions have to be met for the convergence of a product.

$(1.)$

An infinite product: $$\prod_{j=1}^{\infty} (1+a_{j})$$

is said to converge if

$(1.)$ only a finite number $a_{j_{i}}, \cdot \cdot \cdot, a_{j_{k}}$ of those $a_{j}$'s are equal to $-1$

$(2.)$ if $N_{o} > 0$ is so large that $a_{j} \neq -1$ for $j > N_{o}$, then:

$$\lim_{N \rightarrow \infty} \prod_{j = N_{o} +1 }(1+a_{j})$$