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Small helical magnetic perturbations from extra coils can suppress them in present tokamaks, but only in narrow conditions.","posed_since":"","precise":"Resonant magnetic perturbations (RMPs, applied nonaxisymmetric fields with toroidal mode number $n=1\\ \\text{to}\\ 4$) suppress type-I ELMs in DIII-D, KSTAR, EAST and ASDEX Upgrade in narrow windows of edge safety factor $q_{95}$ and at low pedestal collisionality, apparently when the field penetrates as an island near the pedestal top. Determine, with validated two-fluid nonlinear MHD, whether the ITER coil set achieves penetration and suppression in the $Q=10$ baseline at ITER pedestal collisionality and rotation. An answer is yes or no with predicted $q_{95}$ windows and required coil current.","problem_ref":"ef26d040622b8f9e474af9e736f2780e6fb3149ff90fd734916455f0a4ed27f0","references":"","settled_by":"A validated penetration-threshold model applied to ITER, then ITER high-performance operation.","status_note":"","title":"Will resonant magnetic perturbations suppress ELMs in 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